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SPACEX
FALCON USER'S GUIDE
Version 8 – March 2025
COPYRIGHT
Subject to the existing rights of third parties, Space Exploration Technologies Corp. (SpaceX) is the owner of the copyright in this work, and no portion hereof is to be copied, reproduced, or disseminated without the prior written consent of SpaceX.
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FALCON USER'S GUIDE
TABLE OF CONTENTS
1 INTRODUCTION...1 1.1 USER'S GUIDE PURPOSE...1 1.2 COMPANY DESCRIPTION...1 1.3 FALCON PROGRAM OVERVIEW...2 1.4 FALCON LAUNCH VEHICLE SAFETY...3 1.5 FALCON RELIABILITY...4 1.5 PRICING...5
2 VEHICLES...6 2.1 FALCON VEHICLE OVERVIEW...6 2.2 FALCON HEAVY VEHICLE OVERVIEW...6 2.3 STRUCTURE AND PROPULSION...8 2.4 RETENTION, RELEASE, AND SEPARATION SYSTEMS...9 2.5 AVIONICS AND GUIDANCE, NAVIGATION, AND CONTROL...10
3 PERFORMANCE...11 3.1 AVAILABLE INJECTION ORBITS...11 3.2 MASS-TO-ORBIT CAPABILITY...12 3.3 LAUNCH WINDOWS...12 3.4 FLIGHT ATTITUDE...13 3.5 SEPARATION ATTITUDE AND ACCURACY...13 3.6 MULTIPLE PAYLOADS & CONSTELLATIONS...14
4 INTERFACES...15 4.1 MECHANICAL INTERFACES...15 4.2 MASS – CG LIMITATIONS...22 4.3 PAYLOAD FLUID INTERFACES...24 4.4 ELECTRICAL INTERFACES...25 4.5 INTERFACE COMPATIBILITY VERIFICATION REQUIREMENTS...30
5 ENVIRONMENTS...31 5.1 TRANSPORTATION ENVIRONMENTS...31 5.2 TEMPERATURE, HUMIDITY, AND CLEANLINESS...31 5.3 FLIGHT ENVIRONMENTS...32
6 PAYLOAD DESIGN REQUIREMENTS...43 6.1 DESIGN FACTORS...43 6.2 FASTENERS AND CABLE TIES...43 6.3 ISOLATORS...44 6.4 PRESSURE VESSELS AND SYSTEMS...44 6.5 SOLID PROPULSION SYSTEMS...47
7 VERIFICATION...48 7.1 VERIFICATION TEST APPROACH...48
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7.2 PAYLOAD TEST LEVELS .....49 7.3 CONSTELLATION TESTING (LOT ACCEPTANCE TESTING) .....52 7.4 ENVIRONMENTAL VERIFICATION REQUIREMENTS .....53 7.5 VERIFICATION FOR PRESSURE VESSELS AND SYSTEMS .....57
8 FACILITIES .....58 8.1 SPACEX EAST COAST LAUNCH FACILITIES .....58 8.2 VANDENBERG SPACE FORCE BASE, CALIFORNIA .....61 8.3 HAWTHORNE, CALIFORNIA .....68 8.4 ROCKET DEVELOPMENT FACILITY—MCGREGON, TEXAS .....68 8.5 GOVERNMENT OUTREACH AND LEGAL AFFAIRS—WASHINGTON, DC .....69
9 MISSION INTEGRATION AND SERVICES .....70 9.1 CONTRACTING .....70 9.2 MISSION MANAGEMENT .....70 9.3 STANDARD SERVICES .....71 9.4 SCHEDULE .....72 9.5 CUSTOMER DELIVERABLES .....72
10 OPERATIONS .....75 10.1 OVERVIEW AND SCHEDULE .....75 10.2 SPACECRAFT DELIVERY AND TRANSPORTATION .....75 10.3 SPACECRAFT PROCESSING .....76 10.4 JOINT OPERATIONS AND INTEGRATION .....79 10.5 LAUNCH OPERATIONS .....80 10.6 FLIGHT OPERATIONS .....83 10.7 SAMPLE MISSION PROFILE .....84
11 SAFETY .....86 11.1 SAFETY REQUIREMENTS .....86 11.2 HAZARDOUS SYSTEMS AND OPERATIONS .....86 11.3 WAIVERS .....86
12 CONTACT INFORMATION .....87 APPENDIX A: PAF MECHANICAL INTERFACES .....88 APPENDIX B: PAYLOAD MECHANICAL, ELECTRICAL AND PURGE STANDARD INTERFACES .....91 APPENDIX C: CONSTELLATION PAYLOAD MECHANICAL INTERFACES AND KEEP-IN VOLUMES .....100 APPENDIX D: CRYOGENIC PROPELANT INTERFACE .....105 APPENDIX E: PAYLOAD CAD MODEL REQUIREMENTS .....106 APPENDIX F: PAYLOAD DYNAMIC MODEL REQUIREMENTS .....107 APPENDIX G: PAYLOAD THERMAL MODEL REQUIREMENTS .....111 APPENDIX H: DELIVERY FORMAT OF SEPARATION STATE VECTOR .....115 APPENDIX I: TEST SCHEDULE FOR CONSTELLATIONS .....116
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ACRONYMS ACS................................attitude control system AFSPCMAN................................Air Force Space Command Manual AWG................................American wire gauge BPSK................................binary phase shift keying CG................................center of gravity C3................................characteristic energy (escape energy) CAD................................computer-aided design CCSFS................................Cape Canaveral Space Force Station CLA................................coupled loads analysis CRS................................Commercial Resupply Services DSSS................................direct-sequence spread spectrum ECS................................environmental control system EELV................................evolved expendable launch vehicle EGSE................................electrical ground support equipment ESPA................................EELV secondary payload adapter FAA................................Federal Aviation Administration FM................................frequency modulation GN₂................................gaseous nitrogen GNSS................................Global Navigation Satellite System GPS................................Global Positioning System GSE................................ground support equipment GSO................................geosynchronous orbit GTO................................geosynchronous transfer orbit HEO................................highly elliptical orbit HITL................................hardware-in-the-loop HTP................................high test peroxide HVAC................................heating, ventilation, and air conditioning ICD................................interface control document IP................................internet protocol IRIG................................inter-range instrumentation group ISS................................International Space Station LAX................................Los Angeles International Airport
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FALCON USER'S GUIDE
LEO........................................................low-Earth orbit LOX........................................................liquid oxygen LSA........................................................launch services agreement LV........................................................launch vehicle LVLH................................................local vertical/local horizontal M1D................................................Merlin 1D engine Max Q................................................maximum dynamic pressure MDP................................................maximum design pressure MECO................................................main engine cut-off MEOP................................................maximum expected operating pressure MMH................................................monomethylhydrazine MPE................................................maximum predicted environment MVac................................................Merlin Vacuum NASA................................................National Aeronautics and Space Administration NTO................................................nitrogen tetroxide OASPL................................................overall sound pressure level PAF................................................Payload attach fitting PCM................................................pulse code modulation PLA................................................payload adapter PPF................................................payload processing facility PSK................................................phase shift keying Q................................................dynamic pressure RBF................................................remove before flight RF................................................radio frequency RP-1................................................rocket propellant-1 (rocket-grade kerosene) SBA................................................Santa Barbara Airport SC................................................spacecraft SCAPE................................self-contained atmospheric protective ensemble SECO................................second-engine cut-off SES................................second-engine start SLC................................................Space Launch Complex SpaceX................................Space Exploration Technologies Corp. SPL................................................sound pressure level
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SRS................................................shock response spectrum SSO................................................sun-synchronous orbit TAC................................................transport air conditioning TE................................................transporter-erector TEA-TEB................................triethylaluminum-triethylborane U.S................................................United States VSFB................................Vandenberg Space Force Base
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FALCON USER'S GUIDE
LIST OF FIGURES
FIGURE 1:1: SPACEX OFFICES AND SITES ... 2 FIGURE 1:2: SPACEX VEHICLES ARE DESIGNED FOR HIGH CROSS-PLATFORM COMMONALITY ... 3 FIGURE 1:3: FALCON 9 ARCHITECTURE ... 3 FIGURE 2:1: FALCON 9 OVERVIEW ... 6 FIGURE 2:2: A FALCON HEAVY LAUNCH FROM KSC ON APRIL 11, 2019 ... 7 FIGURE 2:3: FALCON HEAVY FIRST STAGE ENGINE LAYOUT ... 8 FIGURE 3:1: GROUND TRACKS/ORBITS OF PREVIOUS FALCON 9/FALCON HEAVY LAUNCHES ... 11 FIGURE 3:2: EXAMPLE OF CS SHIFT BETWEEN TWO PAYLOADS DEPLOYED AT DIFFERENT ORBITS ... 14 FIGURE 4:1: LAUNCH VEHICLE COORDINATE FRAME ... 15 FIGURE 4:2: SIDE MOUNTED PAYLOAD COORDINATE FRAME ... 15 FIGURE 4:3: STANDARD AND EXTENDED FAIRING ... 16 FIGURE 4:4,1,575-MM PAYLOAD ATTACH FITTING ... 18 FIGURE 4:5,2,624-MM PAYLOAD ATTACH FITTING ... 18 FIGURE 4:6,3,117-MM PAYLOAD ATTACH FITTING ... 18 FIGURE 4:7,3,117-MM SIRTU PAF ... 19 FIGURE 4:8:SQUARE PAF ... 19 FIGURE 4:9: EXAMPLE CONSTELLATION ARRANGEMENTS IN A CUBE CONFIGURATION AND OCTAGON CONFIGURATION ... 20 FIGURE 4:10: CUBE ARRANGEMENT KEEP-IN VOLUMES ... 21 FIGURE 4:11: OCTAGON ARRANGEMENT KEEP-IN VOLUMES (2 SHOUN) ... 21 FIGURE 4:12: ALLOWABLE MASS AND CENTER OF GRAVITY ABOVE SIP FOR 1,575 MM, 2,624-MM, AND SQUARE PAF ... 22 FIGURE 4:13: ALLOWABLE MASS CENTER OF GRAVITY HEIGHT ABOVE SIP FOR THE 3,117-MM SIRTU PAF ... 23 FIGURE 4:14: MASS AND CENTER OF GRAVITY LIMITATIONS FOR CONSTELLATION PAYLOADS ... 23 FIGURE 4:15: PAYLOAD MASS AND CENTER OF GRAVITY LIMITATIONS FOR 4-POINT INTERFACES ... 24 FIGURE 4:16: ILLUSTRATION OF BREAKWIRE CHANNEL CATEGORIES ... 26 FIGURE 4:17: ON-PAD ELECTRICAL INTERFACES ... 29 FIGURE 5:1: FALCON 9 AND FALCON HEAVY FLIGHT LIMIT LOAD FACTORS ... 33 FIGURE 5:2: MAXIMUM LIMIT LEVEL AXIAL AND LATERAL RSS EQUIVALENT SINE ENVIRONMENT FOR FALCON 9 AND FALCON HEAVY ... 34 FIGURE 5:3: FALCON 9 ACOUSTIC MPE (P95/50), WITH ACOUSTIC BLANKETS, 50% FILL-FACTOR, WESTERN AND EASTERN RANGE ... 35 FIGURE 5:4: FALCON 9 ACOUSTIC MPE (P95/50), WITHOUT ACOUSTIC BLANKETS, 60% FILL-FACTOR, WESTERN AND EASTERN RANGE ... 36 FIGURE 5:5: FALCON HEAVY ACOUSTIC MPE (P95/50), 60% FILL-FACTOR, EASTERN RANGE ... 37 FIGURE 5:6: SHOCK SOURCES ... 38 FIGURE 5:7: FALCON 9/FALCON HEAVY RANDOM VIBRATION MPE ... 39 FIGURE 5:8: IN-FLIGHT & ENVIRONMENTAL RADIATED EMISSIONS / PAYLOAD RADIATED SUSCEPTIBILITY LIMIT ... 40 FIGURE 5:9: BOUNDING FARING COMPOSITE TEMPERATURE PROFILE ... 42 FIGURE 7:1: FLIGHT VS. TEST CONFIGURATION FOR PAYLOADS USING CLAMPBAND CONFIGURATION ... 49 FIGURE 8:1: SPACE LAUNCH COMPLEX 40 AT CAPE CANAVERAL SPACE FORCE STATION, FLORIDA ... 58 FIGURE 8:2: FALCON 9 LAUNCHES FROM SLC-40 (LEFT) WITH ANOTHER FALCON 9 READY TO LAUNCH FROM LC-39A (RIGHT) ... 59 FIGURE 8:3: LC-39A AT KENNEDY SPACE CENTER, FLORIDA ... 60 FIGURE 8:4: SPACE VANDENBERG FACILITIES ... 61 FIGURE 8:5: SLC-4E SITE OVERVIEW ... 62 FIGURE 8:6: SLC-6 & BUILDING 398 ... 62 FIGURE 8:7: PAD CUSTOMER ROOM ... 64 FIGURE 8:8: CUSTOMER CONTROL ROOMS AT SPACEX LAUNCH AND LANDING CONTROL ... 65 FIGURE 8:9: BUILDING 398 AT SLC-6 ... 66
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FIGURE 8-10: BUILDING 398 PPF MAP........................................................66 FIGURE 8-11: BUILDING 398 PPF LAYOUT........................................................67 FIGURE 8-12: BUILDING 398 PERSONNEL AND HARDWARE ACCESS................................68 FIGURE 8-13: SPACEX IN HAWTHORNE, CALIFORNIA........................................68 FIGURE 8-14: ROCKET DEVELOPMENT FACILITY IN MCGREGOR, TEXAS........................................69 FIGURE 9-1: MISSION MANAGEMENT ORGANIZATION........................................70 FIGURE 10-1: REFERENCE FALCON LAUNCH VEHICLE PROCESSING, INTEGRATION, AND LAUNCH OPERATIONS SCHEDULE........................................75 FIGURE 10-2: VSFB AMNEX AND INTEGRATION HANGAR LAYOUT........................................76 FIGURE 10-3: VSFB BUILDING 398 FOR NON-HYPERGOL PAYLOADS FLOOR PLAN........................................76 FIGURE 10-4: CCSFS PPF EAST BAY FLOOR PLAN................................................77 FIGURE 10-5: CCSFS PPF WEST BAY FLOOR PLAN................................................77 FIGURE 10-6: PAYLOAD ENCAPSULATION AND INTEGRATION SEQUENCE........................................80 FIGURE 10-7: FALCON 9 ON THE TRANSPORTER-ERECTOR IN THE INTEGRATION HANGAR AND DURING ROLLOUT........................................80 FIGURE 10-8: LAUNCH CONTROL ORGANIZATION........................................................81 FIGURE 10-9: SPACEX LAUNCH AND LANDING CONTROL AT THE EASTERN RANGE (LEFT) AND THE WESTERN RANGE (RIGHT)........................................82 FIGURE 10-10: LAUNCH VEHICLE ROLLOUT AND ERECTION................................................82 FIGURE 10-11: FALCON 9 SAMPLE MISSION PROFILE................................................84 FIGURE 10-12: FALCON HEAVY SAMPLE MISSION PROFILE................................................84 FIGURE A-1: 1,575-MM PAF INTERFACE DRAWING................................................88 FIGURE A-2: 2,624-MM PAF INTERFACE DRAWING................................................89 FIGURE A-3: SQUARE PAF INTERFACE DRAWING................................................89 FIGURE B-1: 937-MM CLAMBAND MECHANICAL INTERFACE................................................91 FIGURE B-2: 937-MM CLAMBAND ELECTRICAL INTERFACE................................................92 FIGURE B-3: 937-MM CLAMBAND PURGE INTERFACE (NONSTANDARD SERVICE)................................................93 FIGURE B-4: 1194-MM CLAMBAND MECHANICAL INTERFACE................................................94 FIGURE B-5: 1194-MM CLAMBAND ELECTRICAL INTERFACE................................................95 FIGURE B-6: 1194-MM CLAMBAND PURGE INTERFACE (NONSTANDARD SERVICE)................................................96 FIGURE B-7: 1666-MM CLAMBAND MECHANICAL INTERFACE................................................97 FIGURE B-8: 1666-MM CLAMBAND ELECTRICAL INTERFACE................................................98 FIGURE B-9: 1666-MM CLAMBAND PURGE INTERFACE (NONSTANDARD SERVICE)................................................99 FIGURE B-1: 15" DIAMETER MECHANICAL INTERFACE FOR CONSTELLATION PAYLOADS................................................100 FIGURE B-2: 24" DIAMETER MECHANICAL INTERFACE FOR CONSTELLATION PAYLOADS................................................101 FIGURE C-3: CUBE ARRANGEMENT KEEP-IN VOLUME FOR CONSTELLATION PAYLOADS (NO ACOUSTIC BLANKETS)................................................102 FIGURE C-4: CUBE ARRANGEMENT KEEP-IN VOLUME FOR CONSTELLATION PAYLOADS WITH INTRUSION (NO ACOUSTIC BLANKETS)................................................103 FIGURE D-5: OCTAGON ARRANGEMENT KEEP-IN VOLUME FOR CONSTELLATION PAYLOADS (NO ACOUSTIC BLANKETS)................................................104 FIGURE D-1: CRYO-PROPELLANT MECHANICAL INTERFACE (1,575 MM CLAMBAND)................................................105
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FALCON USER'S GUIDE
LIST OF TABLES
TABLE 1-1: KEY SAFETY FEATURES OF FALCON LAUNCH VEHICLES ... 4 TABLE 2-1: FALCON DIMENSIONS AND CHARACTERISTICS ... 9 TABLE 3-1: FALCON 9 AND FALCON HEAVY LAUNCH SERVICES ... 11 TABLE 3-2: WEATHER VIOLATION RISK FOR EASTERN AND WESTERN RANGES ... 13 TABLE 4-1: GUIDE ON PAF SELECTION AND PAYLOAD AND ADAPTER MASS OVERALL LIMITATIONS ... 17 TABLE 4-2: CONSTELLATION STANDARD CONFIGURATION ... 20 TABLE 4-3: MAXIMUM PAYLOAD MASS PER CONSTELLATION CONFIGURATION¹ ... 20 TABLE 4-4: GN2 PURGE INTERFACE OFFERING ... 24 TABLE 4-5: CRYOGENIC LOADING COMMODITY SPECIFICATIONS ... 25 TABLE 4-6: ELECTRICAL INTERFACE SUMMARY ... 25 TABLE 4-7: PL-SIDE BREAKWIRE RESISTANCE REQUIREMENTS ... 27 TABLE 4-8: EXAMPLE IN-FLIGHT DISCONNECT CONNECTORS ... 27 TABLE 4-9: PAYLOAD ELECTRICAL INTERFACE CONNECTIVITY ... 28 TABLE 4-10: MAXIMUM EXPECTED CABLE LENGTHS BETWEEN PAYLOAD RACKS/EGSE AND SEPARATION PLANE ... 28 TABLE 4-11: EGSE ELECTRICAL PROPERTIES ... 29 TABLE 5-1: QUASI-STATIC LOAD FACTORS FOR TRANSPORTATION ... 31 TABLE 5-2: TEMPERATURE AND CLEANLINESS ENVIRONMENT ... 31 TABLE 5-3: FALCON 9 AND FALCON HEAVY FLIGHT LIMIT LOAD FACTORS ... 33 TABLE 5-4: MAXIMUM LIMIT LEVEL AXIAL AND LATERAL RSS EQUIVALENT SINE ENVIRONMENT FOR FALCON 9 AND FALCON HEAVY ... 34 TABLE 5-5: FALCON 9 ACOUSTIC MPE (P95/50), WITH ACOUSTIC BLANKETS, 60% FILL-FACTOR, WESTERN AND EASTERN RANGE ... 35 TABLE 5-6: FALCON 9 ACOUSTIC MPE (P95/50), WITHOUT ACOUSTIC BLANKETS, 60% FILL-FACTOR, WESTERN AND EASTERN RANGE ... 36 TABLE 5-7: FALCON HEAVY ACOUSTIC MPE (P95/50), 60% FILL-FACTOR, EASTERN RANGE ... 37 TABLE 5-8: LV-INDUCED SHOCK AT THE SPACECRAFT SEPARATION PLANE (P95/50 MPE) ... 38 TABLE 5-9: SEPARATION SYSTEM-INDUCED SHOCK AT THE SPACECRAFT SEPARATION PLANE (AVERAGE) ... 38 TABLE 5-10: FALCON 9/FALCON HEAVY RANDOM VIBRATION MAXIMUM PREDICTED ENVIRONMENT (P95/50) AT TOP OF PAF ... 39 TABLE 5-11: LAUNCH VEHICLE RADIATED EMISSIONS ... 40 TABLE 5-12: LAUNCH SITE RADIATED EMISSIONS ... 40 TABLE 5-13: MAXIMUM PAYLOAD EMISSIONS ... 40 TABLE 5-14: PAYLOAD TRANSMITTER DELAY TIME (SECONDS) ... 41 TABLE 6-1: FACTORS OF SAFETY ... 43 TABLE 6-2: PEAKING FACTORS ... 43 TABLE 6-3: ACCEPTANCE Criteria FOR FASTENERS ATTACHING TO SPACEK HARDWARE ... 43 TABLE 6-4: DESIGN AND TEST FACTORS FOR PRESSURE VESSELS AND SYSTEMS ... 44 TABLE 6-5: PRESSURE VESSEL CLASSIFICATION AND USE RESTRICTIONS ... 45 TABLE 7-1: PAYLOAD TEST LEVELS AND DURATIONS ... 50 TABLE 7-2: CONSTELLATION TESTING - RETEST TRIGGERS ... 53 TABLE 9-1: STANDARD LAUNCH INTEGRATION SCHEDULE ... 72 TABLE 9-2: REQUIRED DOCUMENTS AND DATA FOR ALL PAYLOADS ... 73 TABLE 9-3: ADDITIONAL REQUIRED DOCUMENTS AND DATA FOR NON-US PERSONS AND NON-US GOVERNMENT PAYLOADS ... 73 TABLE 10-1: SERVICES AND EQUIPMENT FOR PAYLOAD PROCESSING ... 78 TABLE 10-2: LAUNCH CONTROL ORGANIZATION ... 81 TABLE 10-3: FALCON 9 SAMPLE FLIGHT TIMELINE—GTO MISSION ... 85 TABLE 10-4: FALCON 9 SAMPLE FLIGHT TIMELINE—LEO MISSION ... 85 TABLE I-1: EXAMPLE TEST SCHEDULE FOR A CONSTELLATION OF 20 IDENTICAL PAYLOADS ... 116
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TABLE I-2: TEST SCHEDULE FOR A CONSTELLATION OF 20 IDENTICAL PAYLOADS (WITH RETEST TRIGGER TYPE 2 EXAMPLE).....117
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CHANGE LOG
Version Date Update 1 October 2015 Original Release 2 May 2016 Updated Release 3 January 2019 Updated Release 4 April 2020 Updated Release 5 August 2020 Updated Release 6 August 2021 Updated Release 7 September 2021 Updated Release 8 March 2025 Updated Release. Major updates listed as follows: • Section 3.3 Launch Windows • Section 3.6 Multiple Payloads & Constellation • Section 4 Interfaces • Section 5 Environments • Section 6 Payload Design Requirements • Section 7 Verification • Appendix A: PAF Mechanical Interfaces • Appendix B: Payload Mechanical, Electrical, and Purge Standard Interfaces • Appendix C: Constellation Payload Mechanical Interfaces and Keep-in Volumes • Appendix D: Cryogenic Fluid Standard Interface • Appendix E: Payload CAD Model Requirements • Appendix F: Payload Dynamic Model Requirements • Appendix G: Payload Thermal Model Requirements • Appendix H: Delivery Format of Separation State Vectors • Appendix I: Test Schedule for Constellations
1 INTRODUCTION
1.1 USER'S GUIDE PURPOSE The Falcon User's Guide is a planning document provided for customers of SpaceX (Space Exploration Technologies Corp.). This document is applicable to the Falcon vehicle configurations with a 5.2 m (17-ft) diameter fairing and the related launch service (Section 2).
This user's guide is intended for pre-contract mission planning and for understanding SpaceX's standard services. The user's guide is not intended for detailed design use. Data for detailed design purposes will be exchanged directly between a SpaceX customer and a SpaceX manager.
SpaceX reserves the right to update this user's guide as required. Future revisions are assumed to always be in process as SpaceX gathers additional data and works to improve its launch vehicle design.
1.2 COMPANY DESCRIPTION SpaceX offers a family of launch vehicles that improves launch reliability and increases access to space. The company was founded on the philosophy that simplicity, reliability, and cost effectiveness are closely connected. We approach all elements of launch services with a focus on simplicity to both increase reliability and lower cost. The SpaceX corporate structure is flat and business processes are lean, resulting in fast decision-making and product delivery. SpaceX products are designed to require low-infrastructure facilities with little overhead, while vehicle design teams are co-located with production and quality assurance staff to tighten the critical feedback loop. The result is highly reliable and producible launch vehicles with quality embedded throughout the process.
Established in 2002 by Elon Musk, SpaceX has developed and flown the Falcon 1 light-lift launch vehicle, the Falcon 9 medium-lift launch vehicle, the Falcon Heavy heavy-lift launch vehicle, and Dragon, which is the first commercially produced spacecraft to visit the International Space Station and the first commercially produced spacecraft to carry people to and from low-Earth orbit (LEO).
SpaceX has built a launch manifest that includes a broad array of commercial, government, and international customers. In 2008, NASA selected the SpaceX Falcon 9 launch vehicle and Dragon spacecraft for the International Space Station Cargo Resupply Services contract. NASA has also awarded SpaceX contracts to develop the capability to transport astronauts to space as well as to launch scientific satellites. SpaceX's first crewed test flight with Dragon launched in May 2020, carrying NASA astronauts Douglas Hurley and Robert Behnken to the International Space Station and safely returning them to Earth two months later. NASA has certified the Falcon 9/9 Dragon system for human spaceflight, and SpaceX is providing operational missions to the International Space Station under the Commercial Crew Program, as well as providing the capability to launch commercial astronauts to space. In addition, SpaceX serves the National Security community and is on contract with the U.S. Space Force for multiple missions on the Falcon family of launch vehicles.
SpaceX has state-of-the-art production, testing, launch, and operations facilities. SpaceX design and manufacturing facilities are conveniently located near the Los Angeles International Airport. This location allows the company to leverage southern California's rich aerospace talent pool. The company also operates cutting-edge propulsion and structural test facilities in central Texas, along with launch sites in Florida and California, and a commercial orbital launch site in development in south Texas. See Figure 1-1 for all SpaceX sites.
FALCON USER'S GUIDE
Figure 1-1: SpaceX Offices and Sites
1.3 FALCON PROGRAM OVERVIEW Drawing on a history of prior launch vehicle and engine programs, SpaceX privately developed the Falcon family of launch vehicles. Component developments include first and second stage engines, cryogenic tank structures, avionics, guidance and control software, and ground support equipment.
With the Falcon 9 and Falcon Heavy launch vehicles, SpaceX is able to offer a full spectrum of medium- and heavy-lift launch capabilities to its customers (Figure 1-2), as well as small and micro satellite launch capabilities via its Rideshare Program. SpaceX currently operates Falcon launch facilities at Cape Canaveral Space Force Station (CCSFS), Kennedy Space Center (KSC), and Vandenberg Space Force Base (VSFB) and can deliver payloads to a wide range of inclinations and altitudes, from low-Earth orbit (LEO) to geosynchronous transfer orbit (GTO) to escape trajectories for interplanetary missions.
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FALCON USER'S GUIDE
FALCON 9 5.2m (17ft) faring
FALCON HEAVY 5.2m (17ft) faring
Figure 1-2: SpaceX vehicles are designed for high cross-platform commonality
4 LANDING LEGS • For landing rocket safety back on Earth after takeoff
INTERSTAGE • Composite structure that connects first and second stages • All-pneumatic separation
SECOND STAGE • Improve start capacity • Powered by one Merlin Vacuum engine
9 MERLIN ENGINES • Engine-out reliability • 1,710,000 lbf of thrust at sea level
FIRST STAGE • Liquid oxygen • kerosene propellants
4 GRID FINS • Aids with precision landing
FAIRING • Protect satellites during delivery to LEO, GTO & beyond
Figure 1-3: Falcon 9 Architecture
The Falcon family has conducted successful flights to the International Space Station (ISS), LEO, medium-Earth orbit (MEO), highly elliptical orbit (HEO), GTO, and Earth-escape trajectories. As of the end of 2024, SpaceX has completed over 430 Falcon launches, making it the most flown U.S. launch vehicle currently in operation.
Reusability is an integral part of the Falcon program. SpaceX pioneered reusability with the first re-flight of an orbital class rocket in 2017. As of February 2025, SpaceX has re-flowed Falcon first stage boosters more than 384 times with a 100% success rate. Since 2018, SpaceX had more missions launching with a flight-proven first stage booster than a first flight booster. SpaceX also started re-flying fairings in late 2019, and as of February 2025 has re-flowed fairing halves on 307 missions with a 100% success rate. By re-flying boosters and fairings, SpaceX increases reliability and improves its designs and procedures by servicing and inspecting hardware as well as incorporating lessons that can only be learned from flight.
1.4 FALCON LAUNCH VEHICLE SAFETY
The Falcon launch vehicles were designed from the beginning to meet NASA human-rated safety margins. We continue to push the limits of rocket technology as we design the safest crew transportation system ever flown while simultaneously advancing toward fully reusable launch vehicles. Our emphasis on safety has led to advancements such as increased structural factors of safety, greater redundancy, and rigorous fault mitigation. Because SpaceX produces one Falcon core vehicle, satellite customers benefit from the high design standards required to safely transport crew. The major safety features are listed in more detail in Table 1-1.
FALCON USER'S GUIDE
Table 1-1: Key Safety Features of Falcon Launch Vehicles
Design/Operations Feature Safety Benefit Designed to NASA human-rating margins and safety requirements Improves reliability for payloads without crew through increased factors of safety, redundancy, and fault mitigation Horizontal manufacturing, processing, and integration Reduces work at height during numerous manufacturing, processing, and integration procedures, and eliminates many overhead operations All-liquid propulsion architecture: fuel and oxidizer are stored separately on the ground and in the vehicle. Propellant is not loaded into the vehicle until the vehicle is erected for launch Rocket-grade kerosene and liquid oxygen as primary propellants Reduces health hazards to processing, integration, and recovery personnel compared to systems that use high toxicity primary propellants Non-explosive, pneumatic release and separation systems for stage separation and standard payload firing separation Zero-debris separation systems significantly reduce orbital debris signature, can be repeatedly tested during the manufacturing process, and eliminate hazardous pyrotechnic devices Regular hardware-in-the-loop (HITL) software testing Complete verification of entire mission profile prior to flight
1.5 FALCON RELIABILITY A study¹ by The Aerospace Corporation found that 91% of known launch vehicle failures in the previous two decades can be attributed to three causes: engine, avionics, and stage separation failures. With this in mind, SpaceX incorporated key engine, avionics, and staging reliability features for high reliability at the architectural level of Falcon launch vehicles. Significant contributors to reliability include:
1.5.1 ENGINES Engine failure modes are minimized by eliminating separate subsystems where appropriate. For example, the first stage thrust vector control system pulls from the high-pressure rocket-grade kerosene system, rather than using a separate hydraulic fluid and pressurization system. Using fuel as the hydraulic fluid eliminates potential failures associated with a separate hydraulic system and with the depletion of hydraulic fluid.
The high-volume engine production required to fly 10 Merlin engines (Falcon 9) or 28 engines (Falcon Heavy) on every launch results in high product quality and repeatability through process control and continuous production. Flying several engines on each mission also quickly builds substantial engineering data and flight heritage.
During Falcon launch operations, the first stage is held on the ground after engine ignition while automated monitors confirm nominal engine operation. An autonomous safe shutdown is performed if any off-nominal condition is detected. Hold-on-pad operations, enabled by the launch vehicle's all-liquid propulsion architecture and autonomous countdown sequence, significantly reduce risks associated with engine start-up failures and underperformance.
By employing multiple first stage engines, SpaceX offers the world's first evolved expendable launch vehicle (EELV)-class system with engine-out capability through much of first-stage flight. System-level vehicle management software controls the shutdown of engines in response to off-nominal engine indications; this has been demonstrated in flight, with 100% primary mission success. Although the likelihood of catastrophic engine failure is low, and failing engines are
¹ Chang, I-Shih. "Space Launch Vehicle Reliability," Aerospace Corporation Publication (2001).
designed to be shut down prior to a catastrophic failure, each engine is housed within its own metal bay to isolate it from neighboring engines.
The second stage Merlin Vacuum engine uses a fixed, non-deploying expansion nozzle, eliminating potential failure modes in nozzle extension.
1.5.2 AVIONICS Falcon launch vehicle avionics, and guidance, navigation, and control systems use a fault-tolerant architecture that provides full vehicle single-fault tolerance and uses modern computing and networking technology to improve performance and reliability. Fault tolerance is achieved either by isolating compartments within avionics boxes or by using triplicated units of specific components. Both the first and second stages host their own multiple redundant lithium-ion batteries to minimize the complexity of the electrical interface.
1.5.3 STAGING ARCHITECTURE AND DESIGN The two stage Falcon 9 architecture was selected to minimize the number of stage separation events, eliminating potential failure modes associated with third and fourth stage separations, as well as potential engine deployment and ignition failure modes in the third and fourth stages. Falcon Heavy uses the same stage architecture as Falcon 9 with the addition of two separating side cores.
The Falcon second stage and Falcon Heavy side booster restraint, release, and separation systems use pneumatic devices that provide low-shock release and positive force separation over a comparatively long stroke. The pneumatic system allows for acceptance and functional testing of the actual flight hardware, which is not possible with a traditional explosives-based separation system.
For each Falcon launch vehicle, SpaceX performs an exhaustive series of tests from the component to the vehicle system level. The test program includes component-level flight acceptance and workmanship testing, structures load and proof testing, flight system and propulsion subsystem-level testing, and full first and second stage testing up to full system testing (including first and second stage static fire testing). In addition to testing environmental extremes (plus margin), flight critical and workmanship sensitive hardware are tested to account for off-nominal conditions. For example, stage separation tests are performed for off-nominal cases with respect to geometrical misalignment, anomalous timing, and sequencing.
The Falcon first stage is designed to survive atmospheric entry and to be recovered, handling both the rigors of the ascent portion of the mission and the loads of the recovery portion. Stage recoverability also provides a unique opportunity to examine recovered hardware and assess design and material selection to continually improve Falcon 9 and Falcon Heavy.
1.5 PRICING The standard price for Falcon 9 and Falcon Heavy launch services can be found at https://www.spacex.com/media/Capabilities&Services.pdf. Pricing includes Range services, standard payload integration, and third-party liability insurance. Please see Section 9.3 for a complete description of standard services. Nonstandard services are also available.
2 VEHICLES Descriptions and performance information in this user's guide are for the Falcon 9 and Falcon Heavy firing configuration; please contact SpaceX for information about Dragon launch capabilities. Table 2-1 provides additional details on Falcon 9 and Falcon Heavy dimensions and design characteristics.
2.1 FALCON VEHICLE OVERVIEW Falcon 9 (Figure 2-1) is a two-stage launch vehicle powered by liquid oxygen (LOX) and rocket-grade kerosene (RP-1). The vehicle is designed, built, and operated by SpaceX. Falcon 9 can be flown with a fairing or with a SpaceX Dragon spacecraft. All first and second stage vehicle systems are the same in the two configurations; only the payload interface to the second stage changes between the fairing and Dragon configurations.
Falcon 9 was updated in the summer of 2015 to a Full Thrust configuration from its previous v1.1 configuration (flown from 2013 – summer 2015). Falcon 9 underwent further updates and first flew its Full Thrust Block 5 configuration in spring 2018. The Falcon 9 Block 5 architecture focused on improving performance, reliability, and life of the vehicle, as well as ensuring the vehicle's ability to meet critical government human spaceflight and non-human spaceflight mission requirements. Engine performance on both stages was improved, releasing additional thrust capability. Thermal protection shielding was modified to support rapid recovery and refurbishment. Avionics designs, thrust structures, and other components were upgraded for commonly, reliability, and performance.
2.2 FALCON HEAVY VEHICLE OVERVIEW Falcon Heavy (Figure 2-2) is a two-stage, heavy-lift launch vehicle powered by LOX and RP-1.
Falcon Heavy builds on the proven, highly reliable design of Falcon 9. Falcon Heavy's first stage comprises three Falcon 9 first stages with enhancements provided to strengthen the cores. Furthermore, Falcon Heavy utilizes the same second stage and same payload fairing as flown on Falcon 9, fully benefiting from the flight heritage provided by Falcon 9 fights. This commonality has also minimized infrastructure unique to the vehicle. SpaceX first launched the Falcon Heavy vehicle in February of 2018.
FALCON USER'S GUIDE
Figure 2-2: A Falcon Heavy launch from KSC on April 11, 2019
The first stage comprises three Falcon 9 first stages; a center core and two side boosters; each booster and the core has nine Merlin 1D (M1D) engines. Each of the 27 first stage engines produces 845 kN (190,000 lbf) of thrust at sea level, for a total of 22,819 kN (5,130,000 lbf) of thrust at liftoff. The two side boosters are connected to the center core at the base engine mount and at the forward end of the LOX tank on the center core.
With nine engines in each first stage booster, Falcon Heavy has propulsion redundancy – unlike any other heavy-lift launch system. The launch vehicle monitors each engine individually during ascent and can, if necessary, preemptively command shutdown of off-nominal engines, provided the minimum injection success criteria are achievable with the remaining engines. This engine-out reliability provides propulsion redundancy throughout first-stage ascent – a feature unique to Falcon launch vehicles.
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2.3 STRUCTURE AND PROPULSION The first stage propellant tank walls of the Falcon vehicles are made from an aluminum lithium alloy. Tanks are manufactured using friction stir welding, the highest strength and most reliable welding technique available. A common dome separates the LOX and RP-1 tanks, and a double-wall transfer tube carries LOX through the center of the RP-1 tank to the engine section. Four grid fins near the top of the first stage along with four deployable legs at the base are nominally flown to support recovery operations.
Nine SpaceX M1D engines power the Falcon 9 first stage with up to 845 kN (190,000 lbf) thrust per engine at sea level, for a total thrust of 7,605 kN (1,710,000 lbf) at liftoff, which has the highest thrust-to-weight ratio of any boost engine ever made. The liquid-propelled Falcon engine powers the Falcon propulsion system. The engine features a reliable turbopump design with a single shaft for the liquid oxygen pump, the fuel pump, and the turbine. The engine uses a gas generator cycle instead of the more complex staged combustion cycle. The regeneratively cooled nozzle and thrust chamber use a milled copper alloy liner that provides large heat flux margins. A pintle injector provides inherent combustion stability. The first stage M1D engines are configured in a circular pattern, with eight engines surrounding a center engine.
Twenty-seven SpaceX Merlin engines power the Falcon Heavy first stage boosters and core for a total thrust of 22,819 kN (5,130,000 lbf) at liftoff. The figure below shows the nomenclature for the center core and side boosters (center, plus y-axis, and minus y-axis). Structurally, the plus y-axis and minus y-axis boosters are identical. The center core consists of thicker tank walls and carries the booster separation system. The z-axis points to zenith when the vehicle is horizontal.
Figure 2-3: Falcon Heavy First Stage Engine Layout After engine start, Falcon vehicles are held down until all vehicle systems are verified as functioning normally before release for liftoff.
The Falcon vehicles' interstage, which connects the first and second stages, is a composite structure consisting of an aluminum honeycomb core surrounded by carbon fiber face sheet piles. The interstage is fixed to the forward end of the
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first stage tank. The stage separation system is located at the forward end of the interstage and interfaces to the second stage.
The second stage tank for Falcon vehicles is a shorter version of the first stage tank and uses most of the same materials, construction, tooling, and manufacturing techniques as the first stage tanks. A single Merlin Vacuum (MVac) engine powers the second stage using a fixed 165.1 expansion nozzle. For added reliability of restart, the engine contains dual redundant triethylaluminum-triethylborane (TEA-TEB) pyrophoric ignitors. In addition, the second stage contains a cold nitrogen gas (GN₂) attitude control system (ACS) for pointing and roll control. The GN₂ ACS is more reliable and produces less contamination than a propellant-based reaction control system.
Table 2-1: Falcon Dimensions and Characteristics
Characteristic First Stage Second Stage Structure Height 70 m (229.6 ft) including both stages, interstage, and standard firing. 75.2 m (246.7 ft) with extended firing. Diameter 3.66 m (12 ft) 3.66 m (12 ft) Type LOX tank – monocoque LOX tank – monocoque Fuel tank – skin and stringer Fuel tanks – skin and stringer Material Aluminum lithium skin, aluminum domes Propulsion Engine type Liquid, gas generator Liquid, gas generator Engine designation M1D M1D Engine designer SpaceX SpaceX Engine manufacturer SpaceX SpaceX Number of engines 9 1 Propellant Liquid oxygen/kerosene (RP-1) Liquid oxygen/kerosene (RP-1) Thrust (stage total) 7,686 kt (sea level) (1,710,000 lbf) 981 kt (Vacuum) (220,500 lbf) Propellant feed system Turbopump Turbopump Throttle capability Yes (190,000 lbf to 108,300 lbf sea level) Yes (220,500 lbf to 140,679 lbf) Restart capability Yes Yes Tank pressurization Heated helium Heated helium Ascent attitude control Pitch, yaw Gimbaled engines Gimbaled engine/nitrogen gas thrusters Roll Gimbaled engines Gimbaled engine/nitrogen gas thrusters Coast attitude control Nitrogen gas thrusters Nitrogen gas thrusters Operations Shutdown process Commanded shutdown Commanded shutdown Stage separation system Pneumatically actuated separation mechanism N/A
2.4 RETENTION, RELEASE, AND SEPARATION SYSTEMS The first and second stages are mated by mechanical latches at three points between the top of the interstage and the base of the second stage fuel tank. After the first stage engines shut down, a high-pressure helium circuit is used to release the latches via redundant actuators. The helium system also preloads four pneumatic pushers, which provide a positive force for stage separation after latch release. This includes a redundant center pusher to further decrease the probability of re-contact between the stages following separation.
The two halves of the standard fairing are fastened by mechanical latches along the fairing vertical seam. To deploy the fairing, a high-pressure helium circuit releases the latches, and four pneumatic pushers facilitate positive-force deployment of the two halves. The use of all-pneumatic separation systems provides a benign shock environment, allows acceptance and preflight testing of the actual separation system hardware, and minimizes debris created during separation.
The two halves of the extended fairing are fastened by a bolted frangible seam joint. To deploy the fairing, redundant detonators initiate a detonation cord contained inside an expanding tube assembly. The detonation causes the expanding tube to expand outwards and break the structural seam between the two farings in a controlled and contained manner. Four pneumatic pushers facilitate positive-force deployment of the two halves. The use of a nonbolted clamshell interface between the payload fairing and the rest of the vehicle provides significant shock attenuation of the separation event, maintaining environments for the payload well within nominal payload requirements.
For Falcon Heavy, the fundamental purpose of the side boosters is to apply axial force to the center core during ascent and increase the impulse delivered to the second stage before stage separation. The timing of the shutdown for the Falcon Heavy side boosters can be tailored for each mission to ensure that the proper impulse is delivered. Each side booster is structurally connected to the center core at forward and aft locations. Two pneumatic pusher separation mechanisms connect the forward ends of each side booster to the center core, fastening the top of the LOX tank in the center core to the side boosters. They maintain the connection during ascent and then actively jettison the side boosters following side booster shutdown. Two identical pusher separation mechanisms connect the aft ends of each side booster to the center core and are used to laterally force the base of the side booster from the center core following shutdown of side boosters.
2.5 AVIONICS AND GUIDANCE, NAVIGATION, AND CONTROL Falcon avionics feature a flight-proven, three-string, fault-tolerant architecture that has been designed to human-rating requirements. Avionics include flight computers, Global Positioning System (GPS) receivers, inertial measurement units, SpaceX designed and manufactured controllers for vehicle control (propulsion, valve, pressurization, separation, and payload interfaces), a network backbone, S-band transmitters, and a C-band transponder for Range Safety tracking. The S-band transmitters are used to transmit telemetry and video to the ground, from both the first and second stages, even after stage separation.
Our launch vehicles are equipped with an autonomous flight termination system (AFTS) to limit the potential damage caused by a launch vehicle malfunction. The system terminates the flight of the vehicle automatically if mission rules are violated. The use of an AFTS requires fewer Range assets to support launch operations, resulting in fewer Range constraints and increased launch opportunities.
3 PERFORMANCE
3.1 AVAILABLE INJECTION ORBITS SpaceX launch services are offered at its Cape Canaveral Space Force Station, Kennedy Space Center, and Vandenberg Space Force Base launch sites. Together, Cape Canaveral Space Force Station and Kennedy Space Center are referred to herein as the Eastern Range. Vandenberg Space Force Base is referred to herein as the Western Range (Section 8).
Figure 3-1: Ground tracks/orbits of previous Falcon 9/Falcon Heavy launches Table 3-1 describes the typical injection orbits available from our operational launch sites. (As other launch sites are activated, this user's guide will be updated.)
Table 3-1: Falcon 9 and Falcon Heavy Launch Services
Insertion Orbit Inclination Range Vehicle Launch Site(s) LEO 28.5 – 55 deg Falcon 9 or Falcon Heavy Eastern Range LEO 55 – 65 deg* Falcon 9 or Falcon Heavy (Eastern Range only) Eastern or Western Range LEO 65 – 85 deg Falcon 9 Western Range LEO / Retrograde 105+ deg Falcon 9 Western Range LEO Polar / SSD 85 – 105 deg* Falcon 9 Western or Eastern Range GTO Up to 28.5 deg Falcon 9 or Falcon Heavy Eastern Range GSO Up to 28.5 deg Falcon Heavy Eastern Range Earth escape N/A Falcon 9 or Falcon Heavy Western or Eastern Range *Subject to mission-specific performance considerations. Falcon Heavy is only available from the Eastern Range
Launch services to a range of low-Earth orbits are available, including services to low-inclination orbits through highinclination and sun-synchronous orbits (SSO). Falcon vehicles can provide either two-burn or direct-inject launch services; two-burn mission profiles optimize vehicle performance, while direct-inject mission profiles offer reduced mission duration and require only a single start of the second stage engine. LEO missions to a 55 deg inclination or lower are typically flown from the Eastern Range. LEO missions can also be flown from the Eastern Range to inclinations between 55 and 65 deg, but doing so has some performance cost due to the need to perform a "dog leg" maneuver. LEO
© Space Exploration Technologies Corp. All rights reserved. 11 missions to higher inclinations are baselined to be flown from Vandenberg Space Force Base, but may also be flown from the Eastern Range in specific cases and at SpaceX's discretion, particularly for SSO orbits for which SpaceX has developed the ability to fly Polar missions from the Eastern Range (contact SpaceX for more information). Launch services to inclinations lower than 28.5 deg are available from the Eastern Range, but they incur a performance penalty.
Launch services to a range of GTOs and other high-altitude orbits are available, including standard GTO, sub-GTO for heavy payloads, and supersynchronous injection. A perigee altitude of 185 km (100 nmi) is baselined for GTO, higher perigee values may be provided subject to SpaceX approval, and may incur a performance penalty. SpaceX may also impose restrictions on certain combinations of perigee and apogee to enable a controlled decibiting of the second stage after satellite separation. Currently, all GTO missions are flown from the Eastern Range.
Launch services directly into geosynchronous orbit (GSO) are available from Kennedy Space Center via Falcon Heavy. The satellite is placed into a circular orbit directly above or below GSO to allow it to phase into its correct orbital position.
Launch services to a range of Earth-escape orbits are available. Customers may also utilize a customer-supplied kick-stage to achieve higher escape energy (C3) performance, based on mission requirements. Earth-escape missions are typically flown from the Eastern Range.
Additional information regarding the Falcon launch vehicle family's world-leading mission design flexibility is available upon request.
3.2 MASS-TO-ORBIT CAPABILITY Mass-to-orbit capabilities for the Falcon 9 and Falcon Heavy fairing configuration are available upon request.
3.3 LAUNCH WINDOWS Falcon launch vehicles can launch any day of the year, at any time of day, subject to environmental limitations and constraints as well as Range availability and readiness. Launch window times and durations are developed specifically for each mission.
In order to maximize launch availability, SpaceX requires its customers to remove constraints that may restrict launch windows to no less than a daily four-hour window as far as possible and to avoid selecting launch windows that result in a high statistical probability of violation (POV) for launch weather constraints as defined in the tables below for launch from the Eastern and Western Ranges, respectively.
For missions that require a near-instantaneous launch window, customer constraints shall not limit SpaceX to less than a 15-second daily launch window to provide SpaceX the flexibility to shift the liftoff time by a few seconds based on the final conjunction assessment results performed by the Combined Space Operations Center (CSpOC) prior to launch.
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Table 3-2: Weather Violation Risk for Eastern and Western Ranges
Weather Violation Percent (%) Risk for Cape Canaveral Falcon Launches
UTIC Hour Jun Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Avg 0 7.1 7.0 8.8 8.8 11.8 10.8 10.4 10.6 1 6.2 7.0 5.8 10.5 13.0 10.5 8.4 12.6 6.1 4.1 6.6 2 6.9 7.3 5.9 5.9 8.5 10.3 9.2 6.7 11.8 5.6 4.5 5.6 7.4 3 7.1 6.5 5.9 5.9 5.8 10.9 7.8 6.7 10.5 5.5 5.7 6.1 7.0 4 6.9 9.5 5.4 4.6 4.6 5.5 6.6 5.6 6.7 10.5 5.5 5.7 6.1 7.0 5 6.4 6.6 5.3 5.2 3.6 7.4 6.2 4.9 8.0 5.0 5.5 5.4 5.8 6 6.8 7.1 5.9 5.3 3.2 6.1 5.0 3.6 6.6 6.7 4.6 5.5 5.4 7 6.2 6.1 5.9 5.7 3.7 4.6 5.6 5.6 6.7 4.7 5.9 5.5 5.4 8 5.8 6.3 5.4 4.8 4.1 5.4 3.8 2.9 6.1 6.2 3.7 5.6 5.0 9 6.2 7.0 4.9 4.3 3.6 6.7 4.7 5.3 6.3 5.5 3.9 5.6 5.3 10 7.2 7.5 4.9 4.3 3.6 6.7 4.7 5.3 6.3 5.5 3.9 5.6 5.3 11 6.6 6.9 5.1 4.5 3.8 7.3 5.4 5.9 7.0 5.9 5.4 5.8 5.8 12 7.4 6.9 5.0 3.8 3.9 7.2 7.3 7.1 7.9 5.6 5.2 5.0 5.9 13 7.1 6.3 5.6 4.2 4.0 8.0 5.4 5.4 7.7 5.5 5.1 5.4 5.9 14 7.2 7.3 6.0 4.3 4.0 7.0 5.6 6.4 7.7 5.5 5.1 5.4 5.9 15 7.2 6.2 4.9 4.7 4.0 6.9 6.1 7.4 8.0 5.9 4.3 5.5 5.9 16 8.3 6.4 4.7 5.1 6.0 9.2 7.1 8.8 8.3 5.2 5.0 6.2 6.7 17 6.7 6.7 6.2 9.3 11.4 16.3 16.9 17.7 11.7 10.4 6.1 15.5 18 7.9 8.1 6.0 6.9 9.7 20.2 12.1 17.0 10.3 4.8 10.5 10.4 19 7.6 8.2 6.2 8.5 11.3 25.7 25.5 23.6 14.8 5.2 5.1 6.5 12.3 20 7.7 8.3 5.9 9.0 12.0 29.9 30.9 26.3 19.0 6.0 5.4 14.0 21 7.2 7.3 6.0 8.0 10.0 29.9 30.9 26.2 23.1 21.7 6.4 13.2 22 8.0 6.3 6.2 9.3 11.4 25.3 29.2 25.4 21.3 5.9 5.3 13.5 23 6.4 7.3 7.9 10.2 12.0 24.4 24.9 27.3 17.9 6.9 5.4 12.9 Avg. 7.2 7.0 5.7 6.1 6.8 13.0 12.4 10.9 10.9 5.7 4.8 5.9 0.0
BLOC | UTC Hour Jun Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Avg. 0 6.1 7.8 5.3 4.5 2.7 0.4 1.3 0.5 1.1 2.2 3.9 8.2 8.5 1 6.7 7.8 4.8 4.6 1.7 0.4 1.3 0.5 1.1 2.2 3.9 8.2 8.5 2 6.1 7.8 5.0 3.8 1.9 0.3 1.3 0.6 0.9 1.5 2.8 6.0 3.9 3 6.1 7.8 5.0 3.8 1.9 0.3 1.3 0.6 0.9 1.5 2.8 6.0 3.9 4 6.8 8.0 5.7 4.1 1.6 0.3 0.8 0.4 1.1 1.0 2.8 6.1 3.1 5 6.2 7.8 5.0 3.8 1.9 0.3 0.8 0.4 1.1 1.0 2.8 6.1 3.1 6 7.2 8.0 5.6 3.5 1.6 0.4 0.7 0.9 1.4 4.0 5.7 3.4 7 7.2 9.0 5.6 3.5 1.6 0.4 0.7 0.9 1.4 4.0 5.7 3.4 8 7.7 8.0 5.6 3.5 1.6 0.4 0.7 0.9 1.4 4.0 5.7 3.4 9 7.8 8.0 5.6 3.5 1.6 0.4 0.7 0.9 1.4 4.0 5.7 3.4 10 7.8 7.7 5.5 3.8 1.8 0.4 2.0 1.1 2.3 3.7 8.3 3.4 11 7.8 7.7 5.5 3.8 1.8 0.4 2.0 1.1 2.3 3.7 8.3 3.4 12 7.8 7.7 5.5 3.8 1.8 0.4 2.0 1.1 2.3 3.7 8.3 3.4 13 9.7 9.0 5.3 3.7 2.4 1.1 1.9 0.4 2.0 3.9 5.9 14 8.2 9.4 4.9 3.8 2.6 0.8 1.3 0.6 1.0 2.1 3.7 6.4 15 8.2 9.4 4.9 3.8 2.6 0.8 1.3 0.6 1.0 2.1 3.7 6.4 16 8.6 9.4 4.4 3.8 1.7 0.8 1.3 0.9 1.0 2.0 3.4 6.4 17 8.3 6.0 4.4 3.8 1.8 0.8 1.3 0.9 1.0 2.0 3.4 6.4 18 8.3 6.0 4.4 3.8 1.8 0.8 1.3 0.9 1.0 2.0 3.4 6.4 19 8.3 6.0 4.4 3.8 1.8 0.8 1.3 0.9 1.0 2.0 3.4 6.4 20 8.2 9.1 5.5 3.9 1.7 0.6 1.1 1.4 2.3 3.2 8.3 3.9 21 7.8 8.1 6.1 4.2 1.7 0.6 1.1 1.4 2.3 3.2 8.3 3.9 22 6.9 8.1 6.1 4.2 1.7 0.6 1.1 1.4 2.3 3.2 8.3 3.9 23 7.0 9.0 6.1 4.9 2.0 1.2 1.6 0.8 0.7 2.0 4.0 6.9 Avg. 7.6 8.8 5.2 3.8 1.8 0.6 1.1 0.7 1.0 2.0 3.6 6.7
3.4 FLIGHT ATTITUDE Falcon 9 and Falcon Heavy can provide payload pointing and roll control during long-duration coast phases for sun avoidance and thermal control. If requested, the Falcon second stage will point the X-axis of the launch vehicle to a customer-specified attitude and perform a passive thermal control roll of up to ±1.5 deg/sec around the launch vehicle X-axis, held to a local vertical/local horizontal (LVLH) roll attitude accuracy of ± 5 deg.
3.5 SEPARATION ATTITUDE AND ACCURACY Falcon launch vehicles offer 3-axis attitude control or spin-stabilized separation as a standard service. For inertial separation, the vehicle will point the second stage and payload to the desired LVLH attitude and minimize attitude rates. For spin-stabilized separation, the Falcon launch vehicle will point the second stage and payload to the desired LVLH attitude and initiate a spin about the launch vehicle X-axis at a customer-specified rate dependent upon payload mass properties.
SpaceX does not implement multiple trajectories for various dates/times and does not provide sun-referenced or inertially referenced attitudes during ascent or for payload separation.
Standard pre-separation attitude and rate accuracies are developed as a mission-specific standard service. More information about separation attitude and rate accuracy is available from SpaceX upon request.
3.6 MULTIPLE PAYLOADS & CONSTELLATIONS
Falcon 9 and Falcon Heavy can launch multiple satellites on a single mission. As a liquid-propellant launch vehicle with restart capability, Falcon launch vehicles also provide flexibility to deploy each satellite into a different orbit, performance allowing. SpaceX also offers dedicated rideshare missions via its Smallsat Rideshare Program.
Falcon launch vehicles can accommodate a broad range of dispenser systems including multi-payload systems and mission-unique adapters. SpaceX can develop and provide such adapters and dispensers if desired, as a nonstandard service, or can integrate third-party systems. Please contact SpaceX with your mission-unique requirements.
See Section 4.1.6 for standard constellation arrangements and interfaces using SpaceX hardware.
3.6.1 SECONDARY PAYLOADS
SpaceX typically reserves the right to manifest secondary payloads aboard Falcon missions on a non-interference basis. Secondary payloads may be manifested on a variety of secondary payload adapters including a SpaceX-developed Rideshare Dispenser Ring, a SpaceX-developed Surfboard, or other mission-unique secondary deployment structures.
Please contact SpaceX or refer to the Rideshare Payload User's Guide or Cake Topper Payload User's Guide for information regarding flight opportunities, interface requirements and pricing for secondary payloads.
3.6.2 CENTER OF GRAVITY SHIFT
For multiple payload deployments that require different insertion orbits or burns as part of a single launch, the maximum CG shift Δ (above the PAF) that is allowed between orbits or burns is 5 cm RSS lateral (launch vehicle CSYS).
• Customer-provided dispenser Customers must meet this requirement (verification by analysis is acceptable) • SpaceX-provided dispenser SpaceX will work with the customer to meet this requirement through stack CG analysis (SpaceX does not intend to supply any mass simulators to help meet the requirement).
Figure 3-2: Example of CG Shift Between Two Payloads Deployed at Different Orbits
4 INTERFACES 4.1 MECHANICAL INTERFACES
4.1.1 LAUNCH VEHICLE COORDINATE FRAME The launch vehicle uses a right-hand X-Y-Z coordinate frame, indicated with the subscript "LV", centered 440.69 cm (173.5 in.) aft of the first stage radial engine gimbal, with +XLV aligned with the vehicle long axis and +ZLV opposite the TE strongback as shown in Figure 4-1. XLV is the roll axis, YLV is the pitch axis, and ZLV is the yaw axis.
Figure 4-1: Launch Vehicle Coordinate Frame
4.1.2 PAYLOAD COORDINATE FRAME The origin of the payload coordinate system is fixed at the center of the separation plane. The payload should use a right-hand X-Y-Z coordinate system (indicated with a subscript "PL").
For forwarded mounted payloads, it is preferred that the payload coordinate system is aligned with launch vehicle axes: payload axial direction +XRL aligned with launch vehicle +XLV (in the direction of deployment), and +ZRL aligned with the launch vehicle +ZLV direction. Customers should provide all data and deliverables in this Payload Coordinate Frame.
For side mounted payloads, it is preferred that the payload coordinate, indicated with a subscript "PL", is defined such that +XRL aligned with the payload axial direction and +ZRL aligned with the launch vehicle +XLV direction as shown in Figure 4-2. Customers should provide all data and deliverables in this Payload Coordinate Frame.
Figure 4-2: Side Mounted Payload Coordinate Frame
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4.1.3 PAYLOAD FAIRINGS AND KEEP-IN VOLUMES
The standard SpaceX Falcon fairing is 5.2 m (17.2 ft) in outer diameter and 13.2 m (43.5 ft) high overall. The payload static envelope for the recoverable standard fairing with acoustic blankets installed is available for download in Table 4-1. Other keep-in volumes are available upon request.
The payload static envelope, or keep-in volume, indicates the volume that the spacecraft is allowed to occupy under static conditions and accounts for payload dynamic deflections relative to the fairing, without intrusion by the fairing due to its dynamic motions. Dynamic deflections are verified via coupled loads analysis (CLA). The geometry of each PAF allows for payload hardware to protrude below the base of the payload static envelope; this is included in the published keep-in volumes. Any payload adapters required (e.g., to achieve a 937-mm or 1,194-mm or 1,666-mm (36.89 in or 47.01 in or 65.59 in) interface) must also fit within the keep-in volumes.
SpaceX can also provide an extended fairing as a nonstandard service. The extended fairing has the same diameter as the standard fairing (5.2 m, 17.2 ft) and an overall height of 18.7 m (61.25 ft). The payload static envelope for the extended fairing is available upon request. Most of the standard and nonstandard services provided for the standard fairing are available for the extended fairing as well. Please contact SpaceX for more details.
The standard fairing includes one access door in the cylindrical portion; SpaceX can also provide a fairing with up to eight access doors as a nonstandard service. The payload fairing doors are all in fixed positions and circular, with a 610-mm (24-in.) diameter size.
All processing requiring access to the payload must be completed prior to fairing encapsulation, including standard remove/install-before-flight items. Post-encapsulation access via the fairing door(s) for remove/install-before-flight items that cannot be accomplished prior to encapsulation can be provided as a nonstandard service. In the event of a payload anomaly requiring customer access to the payload, the standard concept of operations for Falcon vehicles is to return the launch vehicle to the hangar and remove the fairing. Access doors are not designed for emergency access into the payload fairing after encapsulation or once the launch vehicle is on the pad.
A single internal fairing RF antenna system can be provided as a nonstandard service for use during payload antenna testing while on the launch pad, using common command and telemetry frequencies. For missions using an internal fairing RF antenna, SpaceX utilizes fixed RF antennae locations on the fairing and will work to clock the payload accordingly. Contact SpaceX for further information on multiple RF antennae systems or nonstandard frequencies. Internal fairing RF antenna systems are not available for use during flight.
SpaceX can also provide a break wire signal to inform the spacecraft when the fairing is jettisoned, as a nonstandard service, to be used for enabling spacecraft transmitter activation on a non-interference basis.
Figure 4-3: Standard and Extended Fairing
4.1.4 INTERFACE SELECTION GUIDE Customers should select and plan for the following interfaces, masses, and keep in volumes. Masses should be used as an initial guide. Further limitations may exist from mission-specific analyses.
Table 4-1: Guide on PAF Selection and Payload and Adapter Mass Overall Limitations
Single Payload Multi Payload/Constellations
Circular PAF, 1,575 mm Section 4.1.5.1 Total Mass: up to 10,885 kg, see Section 4.2.1 for CG limitations Keep-In Volume: • Standard Fairing, Recoverable, with Blankets – click to download • Standard Fairing, Recoverable, without Blankets – contact SpaceX • Standard Fairing, Expendable – contact SpaceX
Circular PAF, 2,624 mm Section 4.1.5.2 Total Mass: up to 19,050 kg, see Section 4.2.1 for CG limitations Keep-In Volume: • Standard Fairing, Recoverable, with Blankets – click to download • Standard Fairing, Recoverable, without Blankets – contact SpaceX • Standard Fairing, Expendable – contact SpaceX
Circular PAF, 3,117 mm Section 4.1.5.3 Total Mass: Contact SpaceX Keep-In Volume: • Standard Fairing – contact SpaceX • Extended Fairing – contact SpaceX
Strut PAF, 3,117-mm Sections 4.1.5.4 Total Mass: up to 26,500 kg, see Section 4.2.1 for CG limitations Keep-In Volume: • Extended Fairing only – contact SpaceX
Square PAF Section 4.1.5.5 Total Mass: up to 10,885 kg, see Section 4.2.1 for CG limitations Keep-In Volume: • Standard Fairing, Recoverable, with Blankets – click to download • Standard Fairing, Recoverable, without Blankets – contact SpaceX • Standard Fairing, Expendable – contact SpaceX
Total Mass: • Customer-Provided Dispenser: up to 10,885 kg, see Section 4.2.1 for CG limitations • SpaceX-Provided Dispenser: up to 170 kg to 850 kg per payload, depending on Tiers, see Section 4.1.6 and 4.2.2 for limitations Keep-In Volume: • Customer-Provided Dispenser: see options for 'Single Payload' on left • SpaceX-Provided Dispenser: See Section 4.1.6.
4.1.5 PAYLOAD ATTACH FITTINGS
4.1.5.1 1,575-MM PAF The standard mechanical interface between SpaceX-provided Falcon launch vehicle hardware and customer-provided hardware is a 1,575-mm (62.01 in) diameter bolted interface, at the forward end of the launch vehicle PAF (figure 4-4). This interface is designed to conform to the EELV 1,575-mm (62.01 in) diameter medium-payload-class mechanical interface defined in the EELV Standard Interface Specification Rev. C June 2017, and is defined in Appendix A. The forward end of the 1,575-mm PAF includes a close-out plate between the payload and the upper stage of the launch vehicle. SpaceX prefers the use of standard PLA interfaces for this PAF, which are offered as a standard service (see Section 4.1.7). Specifications for standard 937-mm or 1,194-mm or 1,666-mm payload interfaces are detailed in Appendix A. As a nonstandard service, SpaceX can procure a variety of other payload adapters for this interface.
FALCON USER'S GUIDE
Figure 4-4: 1,575-mm Payload Attach Fitting
4.1.5.2 2,624-MM PAF SpaceX offers a PAF with a 2,624-mm (103.307 in.) bolted interface (Figure 4-5) for payloads exceeding the 1,575 mm PAF capability. Interface specifications are detailed in Appendix A. The forward end of the 2,624-mm PAF also includes a close-out plate between the payload and the upper stage of the launch vehicle. SpaceX can provide a structural riser as a nonstandard service to raise the height of the payload interface plane above the keep-out volume. Please contact SpaceX for details. SpaceX can procure a variety of payload adapters for this interface, see Section 4.1.7.
Figure 4-5: 2,624-mm Payload Attach Fitting
4.1.5.3 3,117-MM PAF SpaceX offers a PAF with a 3,117-mm (122.717 in.) bolted interface (Figure 4-6) for heavy to ultra-heavy payloads. Please contact SpaceX for interface specifications and mass-CG limitations. The forward end of the 3,117-mm PAF also includes a close-out plate between the payload and the upper stage of the launch vehicle. SpaceX can procure a 3,100- mm payload adapter as an optional service.
Figure 4-6: 3,117-mm Payload Attach Fitting
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4.1.5.4 STRUT PAF INTERFACE SpaceX offers a 3,117-mm (122.717 in.) payload interface for payloads requiring additional capability (Figure 4-7), using a strut architecture. The forward end of the PAF also includes a close-out plate between the payload and the launch vehicle. Contact SpaceX for interface specifications. The 3,117-mm strut PAF can be used only with an extended fairing.
Figure 4-7: 3,117-mm Strut PAF
4.1.5.5 SQUARE PAF SpaceX offers a square PAF option for a single or multiple manifested payload/constellation dedicated launch (Figure 4-8). See Section 4.1.6 for more details on constellations using square PAF. The square PAF has 96 holes for a 5/16' fastener, arranged in a cube configuration of 24 fastener holes per side (refer to Appendix A). The forward end of the square PAF also includes a close-out filter between the payload and the upper stage of the launch vehicle.
Figure 4-8: Square PAF
4.1.6 CONSTELLATION INTERFACE AND CONFIGURATION OPTIONS With the Square PAF configuration, SpaceX can offer a dedicated, multi-payload mission using standard rideshare hardware developed for SpaceX's Rideshare Program. Please contact SpaceX or refer to the Rideshare Payload User's Guide for information regarding interface requirements, environments, and verification for side-mounted payloads. SpaceX can develop and provide such adapters and dispensers if desired, as a nonstandard service, or can integrate third-party systems.
SpaceX can accommodate up to 21 payloads (with a cube arrangement) or up to 41 payloads (with an octagon arrangement), as shown in Table 4-3 and Figure 4-9. Arrangements are shown as illustration only, and SpaceX could accommodate other arrangements. Each individual payload volume may only contain one payload confined to the available keep-in volume as defined in the following sections. Electrical connectivity may be limited depending on electrical requirement. Please reach out to SpaceX for further information.
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Table 4-2: Constellation Standard Configuration
Cube Arrangement Octagon Arrangement Maximum Number of Tiers 5 + 1 Forward Mounted Payload 5 + 1 Forward Mounted Payload Maximum Number of Payloads 20 + 1 Forward Mounted Payload 40 + 1 Forward Mounted Payload
Figure 4-9: Example Constellation Arrangements in a Cube Configuration and Octagon Configuration
Table 4-3 provides a guide on the maximum payload mass per constellation configuration. Additional limitations exist on center of gravity for each payload per Section 4.2.2, and may be additionally limited by CLA analysis results. This guide assumes a forward mounted payload is present (all available payload interfaces are populated), and the forward mounted payload is identical to side mounted payloads. SpaceX may accommodate a heavier forward mounted payload, please contact SpaceX or consult the Cake Tapper User Guide.
Table 4-3: Maximum Payload Mass per Constellation Configuration¹
Number of Tiers Cube Arrangement Octagon Arrangement Total Payload Max Mass Per Payload Max Mass (identical Payloads) Total Payload Max Mass Per Payload Max Mass (identical Payloads) 1 Tier 4,250 kg 850 kg 7,650 kg 850 kg 2 Tiers 7,650 kg 850 kg 9,945 kg 585 kg 3 Tiers 9,750 kg 750 kg 9,500 kg 380 kg 4 Tiers 9,350 kg 550 kg 9,075 kg 275 kg 5 Tiers 6,930 kg 330 kg 6,970 kg 170 kg
IMPORTANT: Payloads flying with any of the configurations above will need to meet acoustic MPE levels for Falcon 9 without blankets (Section 5.3.4.2). Otherwise, additional restrictions may apply to the keep-in volumes defined in the next section.
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4.1.6.1 CUBE ARRANGEMENT Customers choosing a cube constellation arrangement configuration may choose between the following interfaces: • 15" standard diameter circular interface • 24" standard diameter circular interface • 4-point interface
For payloads with a 24" diameter interface, there is an allowable 177.8 mm intrusion through the SpaceX-provided mechanical interface. Cube arrangement keep-in volumes are shown in Figure 4-10. Detailed volume dimensions and fastener interfaces can be found in Appendix C and the Rideshare Payload User's Guide. Refer to "XL Plate" and "XL Plate with Intrusion" interfaces. Payload adapters and separation systems must also fit within the keep-in volumes.
Figure 4-10: Cube Arrangement Keep-In Volumes
4.1.6.2 OCTAGON ARRANGEMENT Customers choosing an octagon arrangement may choose between the following interfaces: • 15" standard diameter circular interface • 4-point interface (limited to 16" wide footprint; height may vary between 16" and 40" in 4" increments)
The octagon arrangement keep-in volumes are shown in Figure 4-11 (two volumes shown). Detailed volume dimensions and fastener interfaces can be found in Appendix C and the Rideshare Payload User's Guide. Refer to "Half XL Plate" interfaces. Payload adapters and separation systems must also fit within the keep-in volumes.
Figure 4-11: Octagon Arrangement Keep-In Volumes (2 Shown)
4.1.6.3 OTHER PAYLOAD ARRANGEMENTS SpaceX may supply other multi-payload and constellation arrangements outside of these published options. Please contact SpaceX for more information.
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4.1.7 PAYLOAD ADAPTERS AND SEPARATION SYSTEMS SpaceX has extensive experience procuring payload adapter and separation systems for a variety of payloads.
4.1.7.1 STANDARD SERVICE For customers with 937-mm (36.89 in.) or 1,194-mm (47.01 in.) or 1,666-mm (65.59 in.) clampband interface, SpaceX will either provide and integrate a payload adapter and clampband separation system or will integrate an adapter and separation system chosen and provided by the customer with the launch vehicle, as a standard service.
SpaceX prefers the use of standard PLA interfaces. Specifications for standard 937-mm or 1,194-mm or 1,666-mm interfaces are detailed in Appendix B: Payload Mechanical, Electrical and Purge Standard Interfaces.
4.1.7.2 NONSTANDARD SERVICE For customers with alternative interface requirements, SpaceX can procure almost any industry-standard adapter system as a nonstandard service. SpaceX has experience integrating numerous commercially available and internally developed adapters and separation systems. Falcon 9 and Falcon Heavy are compatible with adapter and separation system products offered by industry-leading providers.
4.2 MASS – CG LIMITATIONS
4.2.1 PAF MASS-CG LIMITATIONS Payloads should comply with the mass and CG properties limitations given in Figure 4-12 (for the 1,575-mm PAF, square PAF, and 2,624-mm PAF), and Figure 4-13 (for the 3,117-mm strut PAF). Payloads exceeding these limits may be accommodated as a mission-unique service. Payload mass properties should be assessed for all items forward of the PAF 1,575-mm, 2,624-mm, or 3,117-mm bolted interfaces, including any mission-unique payload adapters and separation systems. Mass properties capabilities may be further constrained by mission-unique payload adapters, dispensers, separation systems, or CLA results.
Figure 4-12: Allowable Mass and Center of Gravity above SIP for 1,575 mm, 2,624-mm, and Square PAF
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Figure 4-13: Allowable Mass Center of Gravity Height above SIP for the 3,117-mm Strut PAF
4.2.2 MASS-CG LIMITATIONS FOR CONSTELLATION PAYLOADS For payloads with a 15' or 24' diameter mechanical interface, the mass and Xₛ CG limitations are defined in Figure 4-14.
Note: CG limitation is relative to the launch vehicle interface, inclusive of separation systems. Typical separation system height for a side mounted payload is 50-55 mm.
Figure 4-14: Mass and Center of Gravity Limitations for Constellation Payloads
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For payloads with a 4-point interface, the mass and CG limitations are defined in Figure 4-15. Customers must select the mass and CG curve that matches the shorter edge of their 4-point interface, as measured from foot to foot.
Note: CG limitation is relative to the launch vehicle interface, inclusive of separation systems. Typical separation system height for a side mounted payload is 50-55 mm.
Examples:
• For a 16" x 24" 4-point interface, mass and CG must be within the 'Short edge 16" or greater' capability curve. • For a 28" x 28" 4-point interface, mass and CG must be within the 'Short edge 24" or greater' capability curve.
Figure 4-15: Payload Mass and Center of Gravity Limitations for 4-Point Interfaces
SpaceX requires that customers verify the mass properties of their system through measurement before shipping it to the launch site. SpaceX may request insight into relevant analyses and testing performed for satellite qualification, acceptance, and interface verification. Falcon vehicles may be able to accommodate payloads with characteristics outside the limitations indicated in this section. Please contact SpaceX with your mission-unique requirements.
4.3 PAYLOAD FLUID INTERFACES
4.3.1 GN2 PURGE
SpaceX can offer a purge interface as a nonstandard service. Specifications are provided in Table 4-4 and Appendix B: Payload Mechanical, Electrical and Purge Standard Interfaces.
Table 4-4: GN2 Purge Interface Offering
Purge Requirements Specification GN2 Purge Gas Purity MIL-PRIF-27401G, Type 1, Grade B Purge Line/Fitting Cleanliness IEST-STD-CC1246 level 100R1 GN2 Purge Pressure 0 – 3.45 barg (0 – 50 psig) GN2 Purge Flow Rate 5 – 50 SLPM
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4.3.2 CRYOGENIC PROPELLANT LOADING SpaceX can offer LOX and LCH₄ cryogenic propellant loading as a nonstandard service at LC-39A Specifications are provided below and in Appendix D. Please contact SpaceX for further information.
• SpaceX provides four (4) cryogenic propellant loading lines, including one (1) LOX fill line, one (1) LOX drain line, one (1) LCH4 fill line, and one (1) LCH4 drain line.
• SpaceX provides four (4) QDs to serve as the interface between the payload-side cryogenic lines and the LV-side cryogenic lines. SpaceX will provide and manage both payload side and LV side of the QD lines.
• The customer shall use flex hoses with a 4% outer diameter to mate to the SpaceX QDs per specifications in Appendix D: Cryogenic Propellant Interface. Flex hoses and flex hose fittings are provided by the customer.
• Payload must be compatible with a 1,575 mm payload adapter. Specifications are defined in relation to the payload to LV interface plane (1,575-mm adapter passive ring interface).
• Commodity specifications are shown in Table 4-5.
• During cryogenic loading operations, only one commodity will be filled at a time. SpaceX must be able to control the payload-side fill/drain valves as part of the cryogenic loading operation.
• Cryogenic loading operations will be jointly developed between the customer and SpaceX.
Verification Customers must demonstrate that the payload passes successful integrated leak checks. See Section 7.5.3.
Table 4-5: Cryogenic Loading Commodity Specifications
| Specification | MIL PRF 25508 Grade A (99.6%) | Highest purity product available, with agreement from customer |
|---|---|---|
| Flowrate | Max. 45.4 L/min (12 GPM) | Max. 75.7 L/min (20 GPM) |
| Pressure (Liquid fill) | Max. 6.89 bar (100 psia) | Max. 6.89 bar (100 psia) |
| Pressure (Ullage) | Max. 6.89 bar (100 psia) | Max. 6.89 bar (100 psia) |
| Propellant Ground Interface Temperature | Min. -190°C (-310°F) | Min. -168°C (-270°F) |
| Filtration | 139 µm abs | 139 µm abs. |
4.4 ELECTRICAL INTERFACES Falcon vehicles provide electrical connectivity between the payload and customer-provided electrical ground support equipment prior to launch, as well as in-flight separation device commanding and separation monitoring. Table 4-6 summarizes the standard electrical offering for payloads:
Table 4-6: Electrical Interface Summary
| Signal Type | Standard Offering |
|---|---|
| Ground-side Umbilical | Up to 2x 61-Pin Connectors |
| Separation Command | Up to 81x Redundant Signals |
| LV-side Breakwire Channels | Up to 160x Channels |
Additional capability, including interleaved telemetry, discrete payload commanding, switch closure functions, and additional payload separation commands are available as a nonstandard service and can be defined as part of payload-specific ICD as part of the mission development process.
4.4.1 SEPARATION COMMANDS Deployment channels are offered in pairs of primary and secondary commands. One primary and one secondary command are used for each actuation. Customer-procurred separation devices must be approved by SpaceX.
All customer-procurred deployment/separation devices directly interfacing with launch vehicle electrical systems must have sufficient reliability to ensure safe deployment. The preferred method of achieving reliability is two independent actuators on separate circuits. Either of these actuators must be capable of independently initiating payload separation, effectively removing a single point of failure to launch vehicle separation. Exceptions to this method are discouraged but can be considered on a case-by-case basis at SpaceX's sole discretion.
All deployments from the launch vehicle will be commanded by SpaceX. The use of customer-provided sequencers for commanding more than one deployment from the launch vehicle within the payload is prohibited.
The deployment device timing delay from receipt of the launch vehicle deployment signal to physical release of the payload is required to be characterized as <2 seconds ± 0.5 second uncertainty.
Each deployment command sent by the launch vehicle can be configured in one of two ways:
Constant-Current Pulse: Used for low-resistance loads, this mode of operation provides up to 6 A of constant current. Specifics of the pulse duration and current setting will be defined as part of the payload-specific ICD.
Bus-Voltage Pulse: Used for high-resistance or motor-driven loads, this mode of operation will provide an unregulated voltage signal with a bus voltage of 24-36 V with a maximum current draw of 6 A. Specifics of the voltage provided to the separation device and pulse duration will be defined as part of the payload-specific ICD.
The specific configuration of the deployment commands will be determined by SpaceX through analysis and testing of each separation device. A test unit of each type of new separation device must be provided by the customer to SpaceX for this testing.
4.4.2 BREAKWIRE CHANNELS Breakwire channels are used to determine separation status of the payload constituents from the launch vehicle. Breakwires are organized into two categories, "PL-side breakwires," which are used by the launch vehicle to detect separation, and "LV-side breakwires," which are used by the payload to detect separation. This is illustrated in Figure 4-16.
Figure 4-16: Illustration of Breakwire Channel Categories
A minimum of one (1) PL-side breakwire is recommended to be used for each deployment from the launch vehicle. SpaceX will evaluate exceptions on a case-by-case basis. There are no restrictions from SpaceX on the number of LV-side breakwires requested by the customer.
PL-side breakwire channels must transition from a low resistance state to a high resistance state, or vice-versa. Table 4-7 defines the required properties of each state.
Table 4-7: PL-Side Breakwire Resistance Requirements
Pl-Side Breakwire State Resistance Requirement Low-resistance state <200 Ω High-resistance state >8 kΩ
It is acceptable for either loopback circuits or separation switches to be used for PL-side and LV-side breakwires. The final properties of the PL-side breakwire circuit(s), including the expected transition during deployment, will be defined as part of the payload-specific ICD.
The Falcon vehicle provides up to 8 PL-side breakwire channels. Customer may request any number of LV-side breakwire loops at a separation connector.
4.4.3 ELECTRICAL UMBILICAL CONNECTORS As a standard service, Falcon launch vehicles provide up to two in-flight disconnect electrical interface points located at the payload separation plane. See Appendix B: Payload Mechanical, Electrical and Purge Standard interfaces for umbilical locations. MIL-C-81703 connectors are strongly recommended to encourage schedule compatibility. A list of examples of in-flight disconnect connectors is shown below in Table 4-8. Falcon is compatible with many connectors outside of this list. Please contact SpaceX if you have questions regarding the use of a specific connector.
Table 4-8: Example In-Flight Disconnect Connectors Part Number (Payload-side) Part Number (LV-side) Number of Electrical Contacts DBAS-70-61-OSN DBAS-79-61-DPN 61 DBAS-70-61-OSY DBAS-79-61-OPY 61
All customer electrical interfaces, including EGSE interfaces, will be defined as part of the payload-specific ICD.
4.4.4 FLIGHT HARNESS DESIGN Flight harnesses are nominally designed and built by SpaceX up to the payload interface at the separation plane. Other interface locations are possible. The interface location and build responsibility of the harnesses will be defined as part of the payload-specific ICD.
4.4.5 UMBILICAL CONNECTIVITY DURING PAYLOAD PROCESSING AND ON LAUNCH PAD The Falcon 9 and Falcon Heavy systems accommodate electrical connectivity between customer EGSE and the payload during most processing and integration activities. Table 4-9 summarizes the availability of interfaces during standard processing and integration activities. Customers may connect directly between their EGSE and their payload during payload processing operations. Electrical interfaces will not be available during SpaceX adapter mate, encapsulation, launch vehicle integration, and rollout operations. However, between these steps the customer will be able to interface with its payload. Customers may supply separate EGSE for payload processing facility (PPF) and pad operations or may relocate EGSE from the PPF to the pad.
Table 4-9: Payload Electrical Interface Connectivity
Phase Interface Connection In PPF (payload processing) Customer cables directly to payload In PPF (adapter mate and encapsulation) None – SpaceX connects the payload to the flight adapter harness; SpaceX will provide payload to PAF connection cables In PPF (encapsulated) Customer cables to PPF junction box or equivalent interface Transport to hangar None – mobile In hangar (pre-integration) Customer cables to hangar junction box In hangar (launch vehicle integration) None – SpaceX connects the flight adapter harness to the second stage flight harness In hangar (on transporter-erector) Customer cables to hangar junction box (J-box) Rollout None – mobile On pad (horizontal and vertical) Customer cables (provided by customer) to pad junction box (J-box) Flight None – separation indication only
Pad EGSE provided by the customer will be housed in an instrument bay beneath the launch pad deck (Section 8.1). Payload EGSE is connected to a SpaceX-provided junction box. If utilizing hangar and pad EGSE connections, customers must provide 6.1-m (20-ft) cables to connect the payload EGSE to the junction box.
The junction box ("J-box") is connected to the launch vehicle transporter-erector via a ground harness. A harness then runs along the length of the transporter-erector and connects to the second stage T-0 quick disconnect. The flight side of the second stage quick disconnect mates to up to four dedicated payload electrical harnesses that are provided by SpaceX as part of the second stage. The payload harnesses are routed along the exterior of the second stage propellant tanks, underneath raceway covers that provide protection during ground and flight operations. At the top of the second stage, the harnesses are routed through the PAF (Section 4.1.5) and to the spacecraft separation plane.
The total cable lengths between the payload racks/EGSE and the spacecraft separation plane are listed in Table 4-10 and shown in Figure 4-17.
Table 4-10: Maximum Expected Cable Lengths Between Payload Racks/EGSE and Separation Plane
Launch Site PPF Hangar Launch Pad VSFB (SLC-4) 30.5 m (100 ft) 208.5 m (584 ft) 171.9 m (564 ft) CCSFS (SLC-40) 18.3 m (60 ft) 197.8 m (649 ft) 171.9 m (564 ft) KSC (LC-39A) 18.3 m (60 ft) 181.1 m (594 ft) 196.3 m (644 ft)
FALCON USER'S GUIDE
Key: Configuration Prior to Fairing Mate to Launch Vehicle (Before and After Encapsulation in the Payload Processing Facility) Configuration After Fairing Mate to Launch Vehicle (Hangar or Pad)
Payload Separation Plane Standard Electrical Interface Plane
EGSE Room Standard Interface Payload Processing Facility Harness
Catenary Umbilical
Transporter Erector Harness
Payload TE J-box
Quick Disconnect
Customer Racks Harness
Customer Payload Racks / EGSE
EGSE Room Standard Interface
Payload EGSE J-box
Quick Connect
Transporter Erector (TE)
Figure 4-17: On-Pad Electrical Interfaces
The lowest available round-trip resistance from EGSE to the standard electrical interface plane is 1 Q. SpaceX ground systems maintain a minimum of 1 MQ of isolation resistance between conductors. Table 4-11 defines the typical distribution of EGSE signal properties offered as a standard service. Contact SpaceX for mission-specific EGSE signal configurations.
Table 4-11: EGSE Electrical Properties
Signal Properties Number of Available Conductors
1 Q one-way resistance 24 2 Q one-way resistance 12 3 Q one-way resistance 60 4 Q one-way resistance 60 13 Q one-way resistance 20 100 Q controlled characteristic impedance 48
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4.4.6 TIMING SERVICES SpaceX can supply inter-range instrumentation group IRIG-B000 or IRIG-B120 time from its GPS clocks to customer EGSE at the PFF and/or the launch pad. A launch countdown clock can also be supplied in the IRIG CS-5246 format. These timing services are provided as a standard service; other options are available as nonstandard services.
4.5 INTERFACE COMPATIBILITY VERIFICATION REQUIREMENTS SpaceX requires that customers verify the compatibility of their systems with the Falcon mechanical, electrical, and fluid interfaces before shipment to the launch site. As a standard service, SpaceX will support a payload adapter mechanical fit check, including electrical connector location compatibility, at a facility of the customer's choosing. This interface compatibility verification does not include a separation shock test. Second unit and later flights of similar systems may be subject to reduced pre-ship verification requirements. Nonstandard verification approaches can be developed on a mission-unique basis.
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5 ENVIRONMENTS Falcon 9 and Falcon Heavy have been designed to provide as benign a payload environment as possible via the use of all-liquid propulsion, a single staging event, deeply throttleable engines, and pneumatic separation systems. The environments presented below reflect mission levels for Falcon 9 and Falcon Heavy and are based on the use of the standard fairing; please contact SpaceX for information on payload environments for missions requiring the extended fairing. Mission-specific analyses will be performed and documented in an interface control document for each mission.
5.1 TRANSPORTATION ENVIRONMENTS Transportation will be accomplished by two-wheeled vehicles: a payload transporter from the PFF to the hangar and the launch vehicle transporter-erector from the hangar to the launch pad. The maximum predicted environments experienced by the payload during transportation are provided in Table 5-1. It is expected that transportation environments will be enveloped by the flight environments in Section 5.3 for most payloads.
Table 5-1: Quasi-Static Load Factors for Transportation Transportation Method LV Longitudinal Acceleration (g) LV RSS Lateral Acceleration (g) PPF to Hangar with payload Transporter -0.5 / +1.5 g 1.0 g Hangar to Pad Rollout using Transporter Erector -1.0 / +1.5 g 1.5 g Limits are inclusive of both static and dynamic loads, including gravity.
5.2 TEMPERATURE, HUMIDITY, AND CLEANLINESS The standard service temperature, humidity, and cleanliness environments during various processing phases are provided in Table 5-2. Values in the table are selectable where explicitly stated. Conditioned air will be disconnected for a short duration during rollout to the pad. Spacecraft environmental temperatures will be maintained above the dew point of the supply air at all times (Note prior to rollout to pad, ECS air may need to be briefly preconditioned to 30°C (86°F) to ensure dew point is not reached). A nitrogen purge is available as a non-standard service, see Section 4.3.1. The PAF and fairing surface are cleaned to Visibly Clean-Highly Sensitive, achieving a residue level between R2E-1 and R1 and a particulate level between 500 and 750 per EST-STD-CC1246E. SpaceX can accommodate environments outside the standard service. Please contact SpaceX for details.
Table 5-2: Temperature and Cleanliness Environments Phase Control System Approx. Duration Temp. (°C [FF]) Humidity (%) Cleanliness (class) Spacecraft processing Facility HVAC 3 weeks 15 – 25 [59 – 77] 30 – 65 100,000 (Class 8) Propellant conditioning Facility HVAC 3 days 15 – 25 [59 – 77] 30 – 65 100,000 (Class 8) Spacecraft propellant loading Facility HVAC Mission unique 15 – 25 [59 – 77] 30 – 65 100,000 (Class 8) Transport from PFF to Hangar Trailer TAC <12 hours 15 – 30 [59 – 86] 0 – 65 10,000 (Class 7 supply air cleanliness) Encapsulated in hangar Ducted supply from hangar ECS 1 week 15 – 25 [59 – 77] 30 – 65 10,000 (Class 7 supply air cleanliness) Encapsulated rollout to pad without ECS None <1 hour N/A N/A 10,000 (Class 7 supply air cleanliness) Encapsulated rollout to pad with ECS Trailer TAC <4 hours 15 – 30 [59 – 86] 0 – 65 10,000 (Class 7 supply air cleanliness) Encapsulated on pad (vertical or horizontal) Pad ECS <1 day Selectable 15.6 – 30 [60 – 86] 0 – 65 10,000 (Class 7 supply air cleanliness)
5.3 FLIGHT ENVIRONMENTS The maximum predicted environments the payload will experience from liftoff through separation are described in the sections below. Falcon vehicles may be able to accommodate payloads with characteristics outside the limitations indicated in these sections and may also be able to provide environments lower than those indicated in these sections. Please contact SpaceX with your mission-unique requirements.
5.3.1 NATURAL FREQUENCY SpaceX recommends that the payload's primary lateral frequency be above 10 Hz, the primary axial frequency be above 25 Hz, and all secondary structure minimum resonant frequencies be above 35 Hz to minimize coupling with launch vehicle dynamics. Payloads, lateral acceleration is primarily driven by wind gusts, engine gimbal maneuvers, first stage engine shutdown, and other short-duration events. Both the first and second stage engines may be throttled to help maintain launch vehicle and payload steady state acceleration limits.
5.3.2 QUASI-STATIC LOADS During flight, the payload will experience a range of axial and lateral accelerations. Axial acceleration is driven by vehicle thrust and drag profiles, lateral acceleration is primarily driven by wind gusts, engine gimbal maneuvers, first stage engine shutdown, and other short-duration events. Both the first and second stage engines may be throttled to help maintain launch vehicle and payload steady state acceleration limits.
Figure 5-1 and Table 5-3 provide the quasi-static load factors envelope for the following mass classes: • Heavy-class payloads - total payload mass greater than 1,800 kg (Falcon 9 and Falcon Heavy) • Medium-class payloads - total payload mass between 1,000 kg and 1,800 kg (Falcon 9 only) • Light-class payloads - total payload mass lower than 1,000 kg (Falcon 9 only)
Please contact SpaceX for more information on Falcon Heavy payloads under 1,800 kg.
Provided loads are maximum flight loads (limit level) and do not contain a qualification factor, refer to Section 7 on test factors and verification. The quasi-static load factors are intended for a single payload mission; multi-payload missions should coordinate directly with SpaceX.$^2$ A positive axial value indicates a compressive net-CG acceleration, while a negative value indicates tension.
Loads are applicable for payloads with and without isolators below the spacecraft interface.
Actual payload loads, accelerations, and deflections are a function of both the launch vehicle and payload structural dynamic properties and can be accurately determined via CLA. Please consult with SpaceX for applicability based on spacecraft modal frequencies and CG height.
$^2$ For forward-facing payloads (Cake Toppers) on a dedicated mission with SpaceX-supplied dispensers, please refer to the Cake Toppers' User Guide for enveloping limit levels. For side-mounted payloads on a dedicated mission with SpaceX-supplied dispensers, please refer to the Rideshare User's Guide for enveloping limit levels.
FALCON USER'S GUIDE
Limit, Payload Mass > 1,800 kg (F9/FH) Limit, Payload Mass 1,000 – 1,800 kg (F9) Limit, Payload Mass < 1,000 kg (F9)
Figure 5-1: Falcon 9 and Falcon Heavy Flight Limit Load Factors
Table 5-3: Falcon 9 and Falcon Heavy Flight Limit Load Factors
1,800 kg (F9/FH) Axial [g] Lateral [g] 1000 – 1,800 kg (F9) Axial [g] Lateral [g] <1,000 kg (F9) Axial [g] Lateral [g]
6.0 0.5 8.5 2.0 11.0 4.0 4.0 0.5 4.0 2.0 5.0 4.0 3.5 2.0 4.0 3.0 5.0 7.5 -1.5 2.0 -1.5 3.0 -2.0 7.5 -1.5 0.5 -1.5 2.0 -2.0 4.0 -2.0 0.5 -4.0 2.0 -6.0 4.0 -2.0 -0.5 -4.0 -2.0 -6.0 -4.0 -1.5 -0.5 -1.5 -2.0 -2.0 -4.0 -1.5 -2.0 -1.5 -3.0 -2.0 -7.5 3.5 -2.0 4.0 -3.0 5.0 -7.5 4.0 -0.5 4.0 -2.0 5.0 -4.0 6.0 -0.5 8.5 -2.0 11.0 -4.0 6.0 0.5 8.5 2.0 11.0 4.0
5.3.3 SINE VIBRATION
The maximum predicted sinusoidal vibration environments are shown in Figure 5-2 and Table 5-4 for:
• Heavy-class payloads - total payload mass greater than 1,800 kg (Falcon 9 and Falcon Heavy) • Medium-light-class payloads - total payload mass lower than 1,800 kg (Falcon 9 only)
These environments represent the vibration levels at the top of the PAF for Q=20 through Q=50, and envelop all stages of flight. Please contact SpaceX for more information on Falcon Heavy payloads under 1,800 kg.
IMPORTANT: If the payload has any isolation systems below the spacecraft interface, these levels do not apply. Reference Section 6.3 and contact SpaceX for further details.
The sine vibration environments are intended for a single payload mission; multi-payload missions should coordinate directly with SpaceX.³
Provided loads are maximum flight loads (limit level) and do not contain a qualification factor; refer to Section 7 for test factors and verification. The results of CLA may be used to modify these levels, if necessary, to reflect the levels at the payload interface.
Figure 5-2: Maximum Limit Level Axial and Lateral RSS Equivalent Sine Environment for Falcon 9 and Falcon Heavy Table 5-4: Maximum Limit Level Axial and Lateral RSS Equivalent Sine Environment for Falcon 9 and Falcon Heavy
Maximum limit level axial sine environment
1,800 kg (F9/FH) Frequency [hz] Eq. sine axial [g] Frequency [hz] Eq. sine axial [g]
Maximum limit level lateral RSL sine environment
1,800 kg (F9/FH) Frequency [hz] Eq. sine lateral [g] Frequency [hz] Eq. sine lateral [g]
5 0.5 5 0.5 5 0.5 20 0.8 30 1.0 85 0.5 25 0.5 35 0.8 100 1.0 100 0.6 25 1.0 35 0.6 75 0.6 85 0.9 100 0.9
5.3.4 ACOUSTICS During flight, the payload will be subjected to a varying acoustic environment, with levels highest near liftoff and during transonic flight, due to aerodynamic excitation. The acoustic environment, defined as the spatial average and derived at a P95/50 level, is shown with full-octave and third-octave definitions. Predicted acoustic levels for a specific mission will depend on the use of acoustic blankets and the payload's size and volume, with smaller payloads generally having lower acoustic levels based on their lower fill fraction of the farings volume. Margin for qualification testing or for payloads larger than 60% faring volume fill is not included in the MPE. Levels are shown for both Western Range and Eastern Range launch sites.
³ For forward facing payloads (Cake Toppers) on a dedicated mission with SpaceX-supplied dispensers, please refer to the Cake Toppers' User Guide for enveloping limit levels. For side-mounted payloads on a dedicated mission with SpaceX-supplied dispensers, please refer to the Rideshare User's Guide for enveloping limit levels.
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5.3.4.1 FALCON 9, STANDARD FAIRING, WITH ACOUSTIC BLANKETS Figure 5-3 and Table 5-5 show the acoustic MPE levels for Falcon 9 standard fairing with acoustic blankets.
Figure 5-3: Falcon 9 Acoustic MPE (P95/50), with Acoustic Blankets, 60% Filt-Factor, Western and Eastern Range Table 5-5: Falcon 9 Acoustic MPE (P95/50), with Acoustic Blankets, 60% Filt-Factor, Western and Eastern Range
Frequency (Hz) Acoustic MPE, WITH blankets, WEST RANGE, 60% Filt- Factor (1/3 Octave) Acoustic MPE, WITH blankets, EAST RANGE, 60% Filt-Factor (1/3 Octave) 31.5 119.8 118.0 40 120.0 119.5 50 120.0 120.0 63 120.0 120.0 80 119.8 119.8 100 120.5 120.5 125 121.5 121.5 160 122.0 122.0 200 121.5 121.5 250 120.5 120.5 315 119.0 119.0 400 117.0 117.0 500 115.0 115.0 630 113.0 113.0 800 111.0 111.0 1000 109.5 109.5 1250 108.0 108.0 1600 107.0 107.0 2000 106.0 106.0 2500 105.0 105.0 3150 104.0 104.0 4000 103.0 103.0 5000 102.0 102.0 6300 101.0 101.0 8000 100.0 100.0 10000 99.0 99.0 OASPL (dB) 131.4 131.3
Frequency Acoustic MPE, WITH blankets, WEST RANGE, 60% Filt-Factor (Full Octave) Acoustic MPE, WITH blankets, EAST RANGE, 60% Filt-Factor (Full Octave) 31.5 124.1 122.4 62 124.7 124.7 125 125.2 125.2 500 120.1 120.1 1000 114.4 114.4 2000 110.8 110.8 4000 107.8 107.8 8000 104.8 104.8 OASPL (dB) 131.6 131.4
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5.3.4.2 FALCON 9, STANDARD FAIRING, WITHOUT ACOUSTIC BLANKETS Figure 5-4 and Table 5-6 show the acoustic MPE levels for Falcon 9 standard fairing without acoustic blankets.
Figure 5-4: Falcon 9 Acoustic MPE (P95/50), without Acoustic Blankets, 60% Fill-Factor, Western and Eastern Range Table 5-6: Falcon 9 Acoustic MPE (P95/50), without Acoustic Blankets, 60% Fill-Factor, Western and Eastern Range
Frequency (Hz) Acoustic MPE, NO blankets, WEST Range, 60% Fill-Factor (1/3 Octave) Acoustic MPE, NO blankets EAST Range, 60% Fill-Factor (1/3 Octave) Acoustic MPE, NO blankets EAST Range, 60% Fill-Factor (Full Octave)
Frequency Acoustic MPE, NO blankets, WEST Range, 60% Fill-Factor (Full Octave) Acoustic MPE, NO blankets EAST Range, 60% Fill-Factor (Full Octave)
OASPL (dB) 137.9 137.6
© Space Exploration Technologies Corp. All rights reserved. 36
5.3.4.3 FALCON HEAVY, STANDARD FAIRING Figure 5-5 and Table 5-7 provide the acoustic MPE levels for Falcon Heavy standard fairing with acoustic blankets. These levels are applicable to launches from the Eastern Range (LC-39A).
Figure 5-5: Falcon Heavy Acoustic MPE (P95/50), 60% Fill-Factor, Eastern Range Table 5-7: Falcon Heavy Acoustic MPE (P95/50), 60% Fill-Factor, Eastern Range
Frequency (Hz) Acoustic MPE (P95/50), 60% Fill-Factor (1/3 Octave) 31.5 120.0 40 126.5 50 126.5 63 125.5 80 125.0 100 124.5 125 124.0 150 123.5 200 123.0 250 122.0 315 120.5 400 118.5 500 116.5 630 114.5 800 112.0 1000 109.5 1250 108.0 1600 107.0 2000 106.0 2500 105.0 3150 104.0 4000 103.0 5000 102.0 6300 101.0 8000 100.0 10000 99.0 OASPL (dB) 135.2
Frequency Acoustic MPE (P95/50), 60% Fill-Factor (Full Octave) 31.5 139.3 63 130.5 125 128.8 250 126.7 500 121.6 1000 114.9 2000 110.8 4000 107.8 8000 104.8 OASPL (dB) 135.6
5.3.4.4 EXTENDED FAIRING Please contact SpaceX for Extended Fairing acoustic levels.
5.3.5 SHOCK Five events during flight result in shock loads:
- Release of the launch vehicle hold-down at liftoff
- Side booster separation (Falcon Heavy only)
- Stage separation
- Fairing separation (Figure 5-6)
- Spacecraft separation (Figure 5-6)
The first three shock events are negligible for the payload, relative to fairing separation and spacecraft separation, because of the large distance and number of joints over which the shock loads will travel and dissipate.
Table 5-8 shows the launch-vehicle-induced shock MPE for Standard and Extended Fairing at the spacecraft separation plane. LV-induced shock is driven by fairing separation.
Spacecraft separation system shock is typically enveloping of LV-induced shock. Table 5-9 shows the separation shock at the spacecraft separation plane for 937-mm or 1,194-mm or 1,666 mm (36.89 in. or 47.01 in. or 65.59 in.) clampband separation systems, derived at an average level. Some separation systems may have shock characteristics that vary and differ from the stated average. Contact SpaceX or the separation system manufacturer for more details. Actual shock environments experienced by the payload at the top of the mission-unique payload adapter will be determined following selection of a specific payload adapter and separation system.
Table 5-8: LV-Induced Shock at the Spacecraft Separation Plane (P95/50 MPE)
| Frequency (Hz) | Standard Fairing SRS (g) | Extended Fairing SRS (g) |
|---|---|---|
| 100 | 30 | 30 |
| 500 | 300 | 500 |
| 10,000 | 300 | 500 |
Table 5-9: Separation System-Induced Shock at the Spacecraft Separation Plane (Average)
| Frequency (Hz) | SRS (g) |
|---|---|
| 100 | 30 |
| 1,000 | 1,000 |
| 10,000 | 1,000 |
© Space Exploration Technologies Corp. All rights reserved. 38
5.3.6 RANDOM VIBRATION The maximum predicted random vibration environment at the top of the PAF is shown in Figure 5-7 and Table 5-10. This environment is derived from flight data measured at the top of the PAF and does not account for any additional attenuation as the vibration traverses the mission-specific payload adapter or spacecraft interface. The smoothline is an envelope of all flight events (ifftoff, Stage 1 ascent, and Stage 2 burns) and is derived at a P95/50 statistical level.
The random vibration environment can be broken into three frequency bands as shown in Figure 5-7 and listed below:
- Low Frequency (20 – 100 Hz): Excitations driven by global vehicle motion and modes. CLA and sine vibration envelop this region
- Mid Frequency (100 Hz – 600 Hz): Excitation due to aeroacoustics
- High Frequency (600 Hz – 2000 Hz): Excitation due to structure-borne vibration from MVac
Table 5-10: Falcon 9/Falcon Heavy Random Vibration Maximum Predicted Environment (P95/50) at Top of PAF
Frequency Falcon 9/Falcon Heavy payload Random Vibration MPE (P95/50) (g²/Hz) All axes 20 0.0044 100 0.0044 300 0.01 700 0.01 800 0.03 925 0.03 2000 0.00644 GRMS 5.13
Figure 5-7: Falcon 9/Falcon Heavy Random Vibration MPE
5.3.6.1 RANDOM VIBRATION ATTENUATION Spacecraft with sensitive components not screened with standard-level qualifications (GEVS or SMC-S-016) may require additional relief from random vibration. SpaceX offers random vibration attenuation as a nonstandard service. For programmatic information, please reach out to SpaceX directly.
5.3.7 ELECTROMAGNETIC Payloads are subject to the electromagnetic environments in the following sections. Payloads that are powered off during ascent should be powered off starting no later than one hour before launch and remain powered off through deployment plus the time specified in Table 5-14 but may still be exposed to the electromagnetic MPE during launch site processing. Payloads that are powered on during ascent must demonstrate compatibility to the environments in this section. Exceedances will be evaluated on a case-by-case basis.
5.3.7.1 IN-FLIGHT AND PRE-FLIGHT ENVIRONMENTAL EMISSIONS Customers must ensure that payload materials or components sensitive to RF environments are compatible with the worst-case radiated environment shown in Figure 5-9. LV, including co-payloads and launch site radiated emissions, are shown in Table 5-11 and Table 5-12, respectively. EMI margin is not included. These levels are inclusive of both the F9 and FH configurations.
Figure 5-8: In-Flight & Environmental Radiated Emissions / Payload Radiated Susceptibility Limit
Table 5-11: Launch Vehicle Radiated Emissions Frequency Range (MHz) E-Field Limit (dBµV/m) 1.0 - 2200.0 120 2200.0 - 2300.0 140 2300.0 - 2360.0 120 2360.0 - 2395.0 140 2395.0 - 18000.0 120
Table 5-12: Launch Site Radiated Emissions Frequency Range (MHz) E-Field Limit (dBµV/m) 1.0 - 400.0 132 400.0 - 1200.0 140 1200.0 - 11000.0 150 11000.0 - 18000.0 132
These limits envelop the expected emissions from the LV, co-payloads, and launch site emitters. The customer should assume 26 dB of shielding from launch site sources when testing and integrating the payload in either the PPF or the LV integration hangar.
5.3.7.2 MAXIMUM SPACECRAFT EMISSIONS The emission envelope for payloads, including 6 dB of EMI safety margin by test, or 12 dB of EMI safety margin by analysis, is shown in Table 5-13. Levels shown are as measured at the spacecraft separation plane.
Table 5-13: Maximum Payload Emissions Frequency Range (MHz) by Test (dBµV/m) by Analysis (dBµV/m) 90.0 - 100.0 108 102 1000.0 - 1127.0 154 148 1127.0 - 1327.0 33 27 1327.0 - 1475.0 154 148 1475.0 - 1675.0 33 27 1675.0 - 18000.0 154 148
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5.3.7.3 PAYLOAD TRANSMITTER TURN-ON DELAY TIME Standard launch services do not permit use of payload transmitters while integrated to the LV hardware. Payload transmitters may only be enabled after a minimum time after payload separation, as defined in Table 5-14 (values may be interpolated). See Section 7.4.6 for verification requirements for payloads that must be powered on.
Table 5-14: Payload Transmitter Delay Time (seconds)
| EIRP (Watts) | ≤0.001 | 0.01 | 0.1 | 1 | 10 | 20 | 100 | 1000 |
|---|---|---|---|---|---|---|---|---|
| EIRP (dBm) | 0 | 10 | 20 | 30 | 40 | 43 | 50 | 60 |
Separation Velocity (m/s) 0.3 | 1 | 2 | 6 | 19 | 58 | 82 | 183 | 578 0.5 | 1 | 2 | 4 | 11 | 35 | 49 | 110 | 347 1.0 | 1 | 1 | 2 | 6 | 18 | 25 | 55 | 174 2.0 | 1 | 1 | 1 | 3 | 9 | 13 | 28 | 87 5.0 | 1 | 1 | 1 | 2 | 4 | 5 | 11 | 35
Additionally, any transmitter centered in the following bands may need to wait to enable these transmitters until "end of mission" as defined by the mission-specific second stage re-entry time or stage passivation.
- Band 1: 2206.0 – 2216.0 MHz
- Band 2: 2227.5 – 2237.5 MHz
- Band 3: 2242.5 – 2260.5 MHz
- Band 4: 2267.5 – 2277.5 MHz
- Band 5: 2365.5 – 2375.5 MHz
- Band 6: 2377.5 – 2387.5 MHz
Customers must inform SpaceX prior to LSA finalization if transmitting inside one of these bands or in any GNSS band.
5.3.7.4 LIGHTNING PROTECTION SpaceX launch pads at CCSFS/KSC contain full lightning protection systems. The integration facilities and hangars are equipped with lightning grounding systems to protect personnel and hardware from lightning. The SLC-40 and LC-39A launch pads are equipped with overhead wire lightning protection systems. These systems are designed to:
- Be a preferential path for lightning to prevent direct attachments to personnel and hardware in the protection zone.
- Avoid side flash between the overhead wires and flight hardware and ground systems.
- Minimize electromagnetic coupling to flight hardware and ground systems in order to protect sensitive electronics.
5.3.7.5 LIGHTNING RETEST Well-defined lightning retest criteria are important to minimize both the risk of damage and the risk of missed launch opportunities for spacecraft and launch vehicles. As such, Falcon launch vehicles have well-defined lightning retest criteria that are based on the lightning distance and amplitude data measured using Range-provided lightning monitoring systems. SpaceX requires spacecraft to provide lightning retest criteria based on lightning strike distance and amplitude.
5.3.8 FAIRING INTERNAL PRESSURE The payload fairing internal pressure will decay at a rate no larger than 2.8 kPa/sec (0.40 psi/sec) from liftoff through immediately prior to fairing separation, except for brief periods during flight, where the payload fairing internal pressure will decay at a rate no larger than 4.5 kPa/sec (0.65 psi/sec), for no more than 5 seconds.
5.3.9 PAYLOAD TEMPERATURE EXPOSURE DURING FLIGHT The SpaceX payload fairing is a composite structure consisting of an aluminum honeycomb core in between carbon fiber face sheet plies. The emissivity of the inner mold line of the payload fairing surface is approximately 0.9. The fairing thermal insulation on the exterior surface of the composite is sized such that the inner mold line composite surface temperature never exceeds the Bounding Fairing Composite Temperature profile shown in Figure 5-9. Payload fairing jettison timing is determined by payload aerothermal heating requirements and physical limitations of the system. The latest expected mission times for fairing deployment are denoted by dashed vertical lines for both Falcon 9 and Falcon Heavy.
Figure 5-9: Bounding Fairing Composite Temperature Profile
5.3.10 FREE MOLECULAR HEATING The payload fairing will nominally be deployed when free molecular aero-thermal heating is less than 1,135 W/m². Other fairing deployment constraints can be accommodated as a standard service, although they may modestly reduce vehicle performance. Please contact SpaceX regarding mission-unique fairing deployment requirements.
6 PAYLOAD DESIGN REQUIREMENTS
6.1 DESIGN FACTORS Purpose: To ensure safety and reliability of the payload, the launch vehicle, and personnel present during operations.
Payload systems and structural components, including separation mechanisms, should be held to the minimum design factors shown in Table 6-1 and Table 6-2. Customers should use the separation system's user guide to account for additional load peaking when determining the compatibility of payloads with their selected separation system.
Table 6-1: Factors of Safety
Factor of Safety Min design factor Yield (flight, ground) 1.10 Joint gap and slip (interfaces) 1.10 Ultimate (flight) 1.25 Ultimate (ground operations) 1.40 Yield (GSE lifting hardware) $^1$ 3.0 Ultimate (GSE lifting hardware) $^1$ 4.0
- AFSPCMAN 91-710 Vol 3 for detailed requirements.
Table 6-2: Peaking Factors
Peaking factor Min design factor Separation system interface Variable $^1$
- Consult Separation System User's Guide for guidance on peaking factor
6.2 FASTENERS AND CABLE TIES
6.2.1 FASTENERS ATTACHING TO SPACEX HARDWARE (IF APPLICABLE) Purpose: To ensure the structural integrity of the payload and of launch vehicle hardware, once mated.
Any fasteners used to mate the payload to SpaceX hardware must meet the requirements shown in Table 6-3. Contact SpaceX for more information on recommended fastener types and/or part numbers.
Table 6-3: Acceptance Criteria for Fasteners Attaching to SpaceX Hardware
Fastener size Per standard interface
Locking features Fasteners must incorporate a minimum of one locking feature that does not depend upon preload to function. In order of preference: o Prevailing torque feature, like a nut plate, distorted thread locking nut, or patched fastener o Lock wire/lock cable o Staked fastener head with process hardness check o Thread locker with proper application process hardness check
Thread engagement Fasteners installed in through-holes shall have a minimum acceptable thread protrusion beyond the end of a nut or nut plate of two thread pitches. This ensures that all the fully formed threads on the fastener can carry load.
Fasteners threaded into blind holes shall be selected to prevent contacting the bottom of the hole or interfering with incomplete internal threads.
Installation Fasteners must be installed by means of an installation procedure that uses a calibrated torque tool, measures installation torque, and verifies retention is functional (e.g., measures prevailing torque and compares to limits, visual verification on lock wire/cable, test coupon for thread locker to test breakaway torque, etc.).
6.2.2 CABLE TIES All cable ties intended for flight must be non-removable, preferably made from Nylon 6/6 or ETFE/Tefzel, and must be included in vibration testing. Removable cable ties are only for temporary use during in-process harness routing and must be removed before flight. Contact SpaceX for recommended part numbers.
6.3 ISOLATORS
6.3.1 ISOLATORS INTERNAL TO PAYLOAD Isolators internal to the payload (for example, to isolate secondary components) must meet the following additional design requirements: • Isolators must have all-metallic fail-safe features. • Isolated assemblies must be on a pattern of four or more isolators.
6.3.2 ISOLATORS BETWEEN PAYLOAD AND LAUNCH VEHICLE SpaceX can procure isolated assemblies for the payload to launch vehicle interface as a nonstandard service. Expected equivalent sine environments as defined in Section 5.3.3 do not apply for payloads isolated from the launch vehicle. Please reach out to SpaceX for further information and expected levels.
6.4 PRESSURE VESSELS AND SYSTEMS
6.4.1 DESIGN AND TEST FACTORS The design and test factors in Table 6-4 shall be used for the design and testing of pressure vessels, lines, and other pressurized components. See Section 7.5 for further detailed verification requirements on pressure vessels and systems.
Table 6-4: Design and Test Factors for Pressure Vessels and Systems
Pressure Component Design safety factors Qualification test factors Must be performed on a dedicated Qualification Component Acceptance test factors Must be performed on Component prior to Integration on Flight Unit
US DOT Pressure Vessels Accepted as is per US DOT certification
Non-US DOT Pressure Vessels Yield: 1.5 x MEOP Ultimate: 2.0 x MEOP Proof Pressure: 1.5 x MEOP Burst Pressure: 2.0 x MEOP
Lines and Fittings (Dia. ≥ 1.5 in) Yield: 1.5 x MEOP Ultimate: 2.5 x MEOP Not required
Lines and Fittings (Dia. <1.5 in) Yield: 1.5 x MEOP Ultimate: 4.0 x MEOP Not required
Valves, Regulators, Cryostats & Other Pressurized Components Yield: 1.5 x MEOP Ultimate: 2.5 x MEOP Proof Pressure: 1.5 x MEOP Burst Pressure: 2.5 x MEOP
Sealed Containers (MEOP ≤ 1 atm on orbit) Yield: 1.5 x MEOP Ultimate: 2.0 x MEOP Not required
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6.4.2 PRESSURE VESSEL SELECTION AND FABRICATION
A pressure vessel is any system containing more than 20,000 J of stored energy (pneumatic and chemical energy) or a MEOP greater than 6.9 barD (100 PsiD). Large, sealed containers that are at atmospheric pressure on the ground are classified as a pressure vessel if they exceed this energy threshold because of the pressure difference that develops on-orbit. Pressure vessel classification and restrictions are shown in Table 6-5.
Table 6-5: Pressure Vessel Classification and Use Restrictions
| Type 1 | Type 2 | Type 3 | Type 4 | Type 5 |
|---|---|---|---|---|
| All metallic | Metallic liner with composite hoop overwrap | Metallic liner with full composite overwrap | Non-metallic liner with full composite overwrap | All composite pressure vessel (no metallic liner) |
| Design Standard & Release | AIAA-S-080 (Current approved release) | AIAA-S-081 (Current approved release) | AIAA-S-081 (Current approved release) | N/A |
| Restrictions | Consult Section 6.4.5 for material compatibility | • Use is discouraged | • Some restrictions on fluid eligibility apply. See Section 6.4.5 |
- SpaceX may apply additional requirements beyond those defined in AIAA-G-082. Contact SpaceX for more details.
6.4.2.1 US DOT PRESSURE VESSELS
Pressure vessels that are United States Department of Transportation (US DOT) certified and are operated within their published limits and working fluids are strongly preferred over custom vessels.
6.4.2.2 NON-US DOT PRESSURE VESSELS
Any pressure vessels that are not US DOT classified require a SpaceX review of qualification and acceptance testing and must meet the following requirements:
• No Type 2, 3, 4, or 5 pressurized-structure tanks where non-pressure loading makes up more than 15% of maximum combined flight stress (15% Rule). • No pressure tanks that require pressure stabilization to hold external structural load. • No additively manufactured tanks. Contact SpaceX for further information. • No bimetallic welded joints in the pressure vessel lines or payload pressure systems. • Pressurization state of the tank must not nominally change between payload propellant load and deployment from the launch vehicle, assuming a constant tank temperature. The tank pressure must not exceed the MDP of the pressure vessel between payload propellant load and deployment from the launch vehicle, considering any thermal effects. Use of HTTP is treated separately, see Section 6.4.5. • Pressure vessels must have a contingency pressure relief valve to vent pressure above personnel safe MEPOP while in ground operations. • Qualification must include all testing per applicable AIAA document listed in Table 6-5 based on pressure vessel type, Section 6.4, and AFSPC 91-710 (Section 12). Pressure vessels must hold burst factors of safety on pressure per applicable AIAA document listed in Table 6-5 based on pressure vessel type, not below factors defined in Table 6-4, or overall design factors of safety defined in Section 6.1 on all combined loading cases. Vessels that carry significant loads beyond pressure (do not meet the 15% rule) must include combined loading in qualification testing per Section 6.4.
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6.4.3 FULLY INTEGRATED PRESSURE SYSTEMS
A pressure system is any system that is intended to be pressurized and that doesn't meet the previous definition of a pressure vessel. This includes both pressure components like valves, fittings, and lines that have the potential to see internal pressure between delivery of the payload to the launch site and on-orbit deployment. Refer to Table 6-4 for design and test factors.
6.4.4 OTHER PRESSURIZED EQUIPMENT AND SEALED CONTAINERS
Other pressurized equipment are components that do not meet the definitions of pressure vessel or pressure systems but may be pressurized at any point between payload delivery and on-orbit deployment. This may include, for example, batteries and cryostats. Sealed containers that are at atmospheric pressure on the ground may also become pressurized on orbit because of the pressure difference that develops on-orbit (up to 1 atm). Refer to Table 6-4 for design and test factors.
6.4.5 PROPELLANT AND MATERIAL COMPATIBILITY REQUIREMENTS
Accepted material compatibility and standards are per the following industry accepted design guides:
• Uney, P.E. & Fester, D.A. (1972). Material Compatibility with Space Storable Propellants Design Guidebook Martin Marietta Corporation. • Johnson, H.T. et al (2005). Fire Explosion, Compatibility, and Safety Hazards of Hydrogen Peroxide (Report No. NASA TM-2005-2131151). National Aeronautics and Space Administration.
SpaceX applies the following restrictions:
• Hypergolic propellant usage. All hypergolic propellants are prohibited for use in Type 4 and Type 5 pressure vessels. • Oxidizers: All oxidizers are prohibited for use in Type 4 and Type 5 pressure vessels. Contact SpaceX for further information. • NTO/Titanium usage: Titanium usage in an NTO-wetted application is prohibited. • Bimetallic welded joints are prohibited. • Cryogenic propellants: As an optional service, SpaceX can load certain cryogenic fuels and consumables post encapsulation. See Section 4.3.2 for cryogenic loading specifications and limitations. • Hydrogen peroxide: Hydrogen peroxide, otherwise known as HTTP, may be used as propellant but carries additional requirements on design and analysis. Specific details include:
○ A propellant tank relief must be provided to protect the propellant tank from excessive pressure due to HTTP decomposition. This relief should be set for no more than 10% above MEOP. ○ The propellant tank must have a MEOP that envelopes the maximum expected pressure after self-pressurization due to HTTP decomposition when the tank is at 32°C (or worst-case temperature profile between payload propellant load and payload separation) over a 50-day period. ○ The relief outlet should be configured such that there is no danger to personnel in case of tank relief. ○ The tank, and if so equipped, tank positive expulsion diaphragm, must be compatible with HTTP. This includes any material on the gas side of the diaphragm, including tank weldment alloys, tank cleaning agents, etc. ○ To minimize the possibility of reactions, all materials that may come in contact with HTTP must be cleaned and passivated, and designs must minimize excessive surface area contact with, and entrapment of, HTTP.
Any material combinations outside of this specification require SpaceX approval and may require testing modifications.
6.4.6 FAULT TOLERANCE FOR PRESSURANT/PROPELLANT RELEASE
The pressure and propellant system must be designed to tolerate a minimum number of credible failures and prevent an overall system failure or mishap due to inadvertent pressurant and/or propellant release.
• For systems using hypergolic propellants, or if a system failure may lead to a catastrophic hazard, the system must have dual fault tolerance (three inhibits to propellant release). This can be accomplished, for example, through the use of three valves in series.
• For all other pressure/propellant systems, the system must be at least single fault tolerant (two inhibits to propellant release). This can be accomplished, for example, through the use of two valves in series.
Inhibits shall be independent and cannot be combined. For example, a single electrical command of two valves in series is not a dual fault tolerant system.
A burst disk can be used in series with a relief valve to demonstrate two inhibits to pressurant/propellant release.
For further details, please refer to Chapter 3 of AFSPC 91-710.
6.5 SOLID PROPULSION SYSTEMS
Solid propulsion ion thrusters are generally acceptable for use and do not have the same restrictions as pressure vessels. Examples of ion thrusters that use solid propellants include gridded electrostatic ion thrusters and field-emission electric propulsion (FEEP). All solid propulsion systems require at least one ignition inhibit.
7 VERIFICATION Customers must verify the compatibility of the payload with the maximum predicted environments defined in Section 5. SpaceX will review the customer's chosen verification approach as well as test results during mission integration to ensure mission safety. Where possible, verification methods have been adapted from publicly available standards such as SMC-S-016, GSFC-STD-7000 (GEVS) and other NASA/AIAA standards. Mission-unique limit levels and CLA levels will be developed during the mission integration process and will serve as the basis for the verification activities. Alternate verification approaches may be acceptable, but coordination with SpaceX is required.
7.1 VERIFICATION TEST APPROACH SpaceX allows three approaches to environmental verification testing at payload level, as detailed below. Note that payloads may utilize different verification strategies for each environment. For example, a dedicated qualification article may be used to validate the primary structure and verify the quasi-static levels, while a protoqualification approach may be used to verify other environments. SpaceX provides a Payload Environments and Test Template for customers to communicate and coordinate the verification approach.
Flight Unit Protocalification The flight unit or the first individual payload flight unit is subjected to protoqualification test levels. Follow-on identical units are tested at acceptance levels. SpaceX prefers testing at the fully integrated payload assembly level, even if the payload consists of multiple smaller payload constituents. With this approach, the protoqualification test validates both structural design and workmanship, while allowing for reduced test factors and durations.
Unit/Fleet Qualification and Acceptance: A dedicated qualification unit (not flown), that is identical to the flight unit is subjected to testing at qualification levels and every flight unit is tested to acceptance test levels. The acceptance tests must be performed at the fully integrated payload assembly level. With this approach, qualification testing validates the structural design and design margin while the acceptance test(s) validate workmanship.
Constellation/Lot Acceptance Testing: Available for constellation-style programs consisting of 10 or more identical payloads (payload do not need to be flown together in a single launch). Allows for reduced testing at Integrated payload level and can be combined with either a protoqualification or a fleet qualification approach. See Section 7.3.
The environments verification approach in this section is designed to ensure the safety of customer-provided flight hardware and the launch vehicle. Throughout this user's guide, tests that are "advised" are designed to ensure on-orbit health and functionality of the payload but are not required to fly on a SpaceX Falcon 9/Falcon Heavy mission. Tests that are "required" must be completed by the customer to ensure mission safety through payload separation.
7.1 ENVIROMENTAL TESTING SETUP Customer-provided GSE is required for testing, to adapt the spacecraft interface to the shaker table. A diagram of the flight configuration versus test configuration is shown in Figure 7-1 for customers utilizing a clamp-band style separation system, for illustration. The qualification and suitability of separation systems supplied by SpaceX will be reviewed for the specific payload application.
FALCON USER'S GUIDE
PAYLOAD
Upper Flyway Ring Customer Provided Clamp band Search Provided Lower Ring/PLA Search Provided Launch Vehicle
FLIGHT CONFIGURATION (CLAMPBAND)
PAYLOAD
Upper Flyway Ring or Adapter to shaker table Customer Provided
TEST CONFIGURATION (CLAMPBAND)
Shaker table adapter Customer Provided
Figure 7-1: Flight vs. Test Configuration for Payloads Using Clampband Configuration
7.1.2 TEST DOCUMENTATION REQUIREMENTS Customers must deliver to SpaceX:
• A test approach summary, using the SpaceX test template, including any and all test-like-you-fly exceptions and deviations from this guide, for review by SpaceX prior to payload testing, and in accordance with the SOW.
• Propulsion system details using the SpaceX test template, for review by SpaceX prior to payload testing, according to requirements as specified in Section 6.4 or Section 6.5, if applicable.
• Verification results, using the SpaceX test template, including test results and other artifacts per requirements defined in Section 7, for review by SpaceX in accordance with the SOW. The results must include all new testlike-you-fly exceptions for approval by SpaceX, including details on test versus flight boundary conditions and any hardware not included in the test set up that will be in the flight configuration. If customer chooses not to complete any "advised" tests, an acknowledgment of the inherent risks to the payload incurred by not completing the "advised" testing must be included.
7.2 PAYLOAD TEST LEVELS
7.2.1 TEST REQUIREMENTS Payload testing must conform to Table 7-1. These levels are applicable to integrated testing of the payload.
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FALCON USER'S GUIDE
Table 7-t: Payload Test Levels and Durations
Unit/Fleet Qualification and Acceptance Approach Flight Unit Qualification Acceptance Protoqualification Must be performed on fully integrated payload Must be performed on the 1st fully integrated payload Unit Not Down Unit Down Unit Down
Static Load ¹ REQUIRED Level: Min 1.25 times the limit load Level: Min 1.0 times the limit load Level: Min 1.25 times the limit load
Sine Vibration REQUIRED Level: Limit Levels x 1.25 Duration: 2 oct./minute sweep rate in each of 3 axes Level: Limit Levels x 1.0 Duration: 4 oct./minute sweep rate in each of 3 axes
Shock Advised Level: MPE + 3 dB WITH Actuations: 2 times in each of 3 axes OR 2 actuations of device Not Required Level: MPE + 3 dB WITH Actuations: 2 times in each of 3 axes OR 2 actuations of device
Acoustic See Section 7.2.2 as a guide to determine REQUIRED test(s)² Level: MPE + 3 dB Duration: 2 minutes Level: MPE + 3 dB Duration: 1 minute
Random Vibration REQUIRED Level: MPE + 3 dB Duration: 2 minutes in each of 3 axes Level: MPE + 3 dB Duration: 1 minute in each of 3 axes
Activation Inhibits ³ Verification that activation inhibits function as intended Verification that activation inhibits function as intended
Electromagnetic Compatibility ⁴ REQUIRED for payloads Powered ON By test: 6 dB EMISM OR by analysis: 12 dB EMISM Not required By test: 6 dB EMISM OR by analysis: 12 dB EMISM
Thermal Vacuum and Thermal Cycle ⁵ Advised Level: Acceptance ± 10 °C Duration: 27 cycles total Level: Envelope of MPT and min: range (24 to 61°C) Duration: 14 cycles total Level: Acceptance ± 5 °C Duration: 20 cycles total
Integrated Pressure leak Test⁶ REQUIRED Level: MEOP per Table 6-4 Duration: 5 min Level: MEOP per Table 6-4 Duration: 5 min Level: MEOP per Table 6-4 Duration: 5 min
Quasi-static load testing can be achieved through a variety of methods, including either sine vibration (sweep), static load, sine burst, or a combination of one or more tests. Static load testing may be conducted on a separate qualification model, even if the payload's principal test approach is protoflight qualification. SpaceX prefers, for small payloads (under 500 kg), the use of sine vibration or sine burst for verifying quasi-static loading.
Random vibration shake testing is often aggressive when it comes to larger spacecraft. Therefore, the customer must determine whether the acoustic or random vibration light environment is enveloping of the spacecraft responses that are not screened by other tests. See Section 7.2.2 on methodology for evaluation and selection of the correct test and Sections 7.4.4 and 7.4.5 for more details on verification.
Verification that the inhibits in the activation of any hazardous systems (such as deployable appendages, propulsion, and undereased RF transmission) function as intended. Verification must be conducted as part of at least one integrated dynamic test (sine vibration, acoustic, or random vibration), see Section 7.4.6.
EMISM (6 dB by test, 12 dB by analysis) is already included in Table 5-12. See Section 7.4.7 for further guidance on electromagnetic compatibility verification.
Thermal cycles can be accrued as a combination of thermal cycling in air and thermal vacuum. It is recommended to include at least four cycles of thermal vacuum unless strong rationale exists that the payload is not sensitive to vacuum.
Additional requirements apply to individual pressure vessels and systems, see Section 7.5. Pressure systems that do not meet material compatibility requirements specified in Section 6.4.5 must contact SpaceX for specific leak testing requirements.
7.2.2 ACOUSTIC VERSUS RANDOM VIBRATION TEST DOWNSELECTION
Customers must assess and decide on the verification strategy to pursue for the mid- to high-frequency environment (100 – 2,000 Hz). The following is meant to be a guide only. It is the customer's responsibility to assess the payload's susceptibility to one or the other environment.
Ultra-light payloads (under 500 kg) should generally pursue a random vibration test verification strategy (unless customer can demonstrate payload is not susceptible to random vibration testing), heavy-mass payloads (over 1,800 kg) should generally pursue an acoustic test verification strategy. Payloads in the light- to medium-mass class (500 to 1,800 kg) should evaluate which environment envelopes the highest response on components susceptible to medium-to-high frequency vibration. Environment susceptibility is highly dependent on the payload's architecture, mass, exposed surface area, components, and component mounting.
Purpose: This section details the methodology for determining whether payloads are driven by the acoustic or random vibration environment (see Table 7-1); in other words, to determine whether an acoustic or random vibration test is sufficient to qualify and screen the payload's secondary interfaces and components for flight.
Verification: Customers must list the method selected and provide details on the methodology pursued and the assessment results to inform the choice of integrated test. Note the levels may be modified (increased) to envelop one or the other environment. In other words, customers may not pick up but may not go below flight level with test margin.
Method A Method A: Response comparison by test Method B: Response comparison by analysis or hybrid analysis/test Method overview Compare component responses from an acoustic and low-level random vibration test Compare component responses from acoustic and random vibration high-fidelity analysis or an acoustic test and random vibration high-fidelity analysis
Method A
- Select relevant interfaces and/or secondary components of interest. For example: • Net CG acceleration of an avionics box • Force at mounting interface between payload structure and a deployable appendage • Acceleration at the center of a large solar array panel
- Exclude components with a cumulative acceleration/force response >95% at 100 Hz (screened by sine vibration testing).
- Conduct a base-driven vibration low-level test to determine transfer function from base input to selected component locations.
- Compute predicted random vibration responses from flight random vibration environment at the locations established from Steps 1 and 2.
- Conduct an acoustic test; measure and/or correlate responses at same locations.
- Calculate equivalent rms force/acceleration at each location, excluding contribution from 0-100 Hz band.
- Compare equivalent rms force/acceleration at each location and determine overall which environment envelopes responses.
Method B
- Select relevant interfaces and/or secondary components of interest. For example: • Net CG acceleration of an avionics box • Force at mounting interface between payload structure and a deployable appendage • Acceleration at the center of a large solar array panel
- Exclude components with a cumulative acceleration/force response >95% at 100 Hz (screened by sine vibration testing).
- Compute predicted random vibration responses from flight random vibration environments, using a high-fidelity, correlated random vibration model.
- Conduct an acoustic test; measure and/or correlate responses at same locations OR use a high-fidelity acoustics analysis to predict the responses at same locations.
- Calculate equivalent rms force/acceleration at each location, excluding contribution from 0-100 Hz band.
- Compare equivalent rms force/acceleration at each location and determine overall which environment envelopes responses.
7.3 CONSTELLATION TESTING (LOT ACCEPTANCE TESTING) Constellations with 10 or more identical payloads may elect to pursue a constellation/lot acceptance testing (LAT) approach. This test approach provides a reduced testing cadence on a spacecraft lot basis.
Eligibility • The constellation consists of 10 or more identical payloads that are flown on one or across multiple SpaceX launches. • Payloads do not need to be flown together on a single launch to be eligible for this approach, but all payloads need to be identical, interchangeable, and manufactured and integrated in the same manner. • Customers must submit the information as required in this section and coordinate with SpaceX to ensure they are eligible to pursue a constellation/lot acceptance testing approach. Otherwise, customers must revert to test each flight unit (see Section 7.1).
Minimum Test Requirements • The first five flight unit serial numbers (consecutively manufactured and integrated) and then flight units at least every fifth serial number must be fully tested at integrated level. • Example test schedule with minimum test requirements is shown in Appendix I: Test Schedule for Constellations (Table I-1). Customers should submit a test schedule, based on their constellation size, documenting the actual test schedule with full constellation size. Any deviations from minimum test requirements should be justified. • Retest triggers (Type 1 and/or Type 2, as detailed below), pre-agreed between SpaceX and the customer, will be used to conduct additional tests on the flight units, if the trigger(s) meet the relevant criteria. • Customer must conduct subscale workmanship screening of all external components on the payload, at minimum for all serial numbers that are not tested at integrated level.
Retest Triggers Retest triggers ensure that both SpaceX and the customer can maintain a high reliability and safety of the payload(s) and the launch vehicle. Retest triggers are split into two types = Type 1 (penalty retest) and Type 2 (delta qualification). Refer to Table 7-2 for requirements on retest and Table 1-2 for an example of a Type 2 retest trigger schedule change.
FALCON USER'S GUIDE
Table 7-2: Constellation Testing - Retest Triggers
Retest Trigger Type 1 – Penalty Retest Retest Trigger Type 2 – Delta Qualification
Rationale To rescreen a flight unit for workmanship (arising from a high amount of rework on that Serial Number or perceived differences in Test vs Flight). Rescreening ensures reliability during launch is maintained.
Retest Trigger(s) One or several of the following triggers are met on any flight Serial Number that requires integrated testing per agreed upon LAT schedule:
- Spacecraft not tested in integrated manner; e.g., mass dummies used in place of external mounted components
- Rework of primary load path or externally mounted interfaces, resulting in more than twenty fasteners reworked on secondary structures, such as panels, covers, etc.
- Rework of fasteners smaller than #3 (or smaller than M2.5)
Retest Perform random vibration or acoustic testing (depending on required test, refer to Section 7.2) at MPE levels for 30 seconds (in each of 3 axes for random vibration).
Retest Trigger Type 1 – Penalty Retest Retest Trigger Type 2 – Delta Qualification
To delta qualify the payload (arising from a change in payload design, or change/drift in workmanship/production)
One or several of the following triggers are met on any flight Serial Number:
- Any change that affects payload structural load path or interfaces with externally mounted appendages (Examples could include a change in payload primary structure or externally mounted secondary structure)
- Any changes detected from component level acceptance testing (Examples could include a drift in component level natural frequencies, substantial change in component mass or M0)
- Major change in assembly and/or manufacturing processes (Examples could include a major change in final assembly work instructions, secondary retention methods, suppliers/personnel involved in final integration, production line interruptions for 6+ months, etc.)
• Perform a delta protoqualification of the Serial Number where the change was implemented and/or detected if the Serial Number is not part of the agreed upon integrated test schedule, an integrated test must be performed) • Perform an acceptance test of the Serial Number immediately following the delta protoqualification test • If successful, resume agreed upon lot acceptance test schedule
Verification/Documentation Requirements
Customer to provide the following evidence for review by SpaceX: • Component-level environments derivations (component level MPE) and subscale component test plan • General design details of interfaces with secondary or externally mounted components, including details on choice and methods for secondary retention • Externally mounted interface margin details, including fastener out (fail safe) analysis • General installation and integration procedures • General quality and product assurance processes
7.4 ENVIRONMENTAL VERIFICATION REQUIREMENTS
7.4.1 QUASI-STATIC LOADING Purpose: To verify that the payload's structural load path and interfaces are qualified to the flight environments and to ensure structural integrity of the payload to launch vehicle interface.
Verification: Testing is REQUIRED to the quasi-static load test levels and durations defined in Section 5.3.2 (flight environments) and Section 7.2 (test factors).
• Quasi-static load testing can be achieved through a variety of methods, including either sine vibration (sweep), static load, sine burst, or a combination of one or more tests. • Static load testing may be conducted on a separate qualification model, even if the payload's main test approach is protoflight qualification. For ultra-light payloads (under 500 kg), SpaceX prefers the use of sine vibration or sine burst for verifying quasi-static loading. Please refer to the Rideshare payload User's Guide. • The test levels should be derived from combined axial and lateral loading to meet the required interface forces/line loading. • Significant deviation between as-tested and flight CG locations and payload mass may result in underqualified primary load paths and interfaces, if using a dynamic test to verify this requirement. Customers should aim to replicate as close as possible in the test the CG position and mass of the flight article. Customers must account for CG and mass differences in test and adjust levels and/or use fluid simulants to represent propellant mass, where necessary.
7.4.2 SINE VIBRATION Purpose: To ensure payloads are compatible with loads on primary and secondary structures with modes <100 Hz.
Verification: Testing is REQUIRED to the sine vibration test levels and durations defined in Table 7-1 in accordance with the MPE defined in Section 5.3.3.
• Secondary notching of the input sine vibration levels must stay above CLA levels. • Any notching must be pre-coordinated with SpaceX for approval at least two weeks in advance of testing. SpaceX also provides remote, near-real time support for customer vibration testing as a standard service. • Significant deviation between as-tested and flight CG locations and payload mass may result in underqualified secondary structures. Customers should aim to replicate as close as possible in the test the CG position and mass of the flight article. Customers must account for CG and mass differences in test and adjust levels and/or use fluid simulants to represent propellant mass, where necessary. • This test may be coupled with the activation inhibit verification as described in Section 7.4.6.
7.4.3 SHOCK Purpose: To ensure payloads are compatible with shock environments experienced during flight.
Verification: Testing or analysis is ADVISED to the shock test levels and durations defined in Table 7-1 in accordance with the MPE defined in Section 5.3.5. Alternatively, customers may show compliance via analysis of all shock-critical components to the shock levels defined in this section.
• Verification by analysis must show that all shock-sensitive components are qualified to a higher level than the MPE. Attenuation propagated to the component's location on the spacecraft is accepted and is the customer's responsibility to show the attenuation analysis. • Customers are ultimately responsible for verifying compliance to the MPE defined in Section 5.3.5. To ensure mission safety, separation systems provided by the customer must be approved by SpaceX.
7.4.4 ACOUSTIC Purpose: To ensure payloads are compatible with acoustic environments inside the launch vehicle fairing. To ensure structural integrity of the payload, secondary structures, large surfaces, and other components during ascent.
Verification:
• If customer demonstrates that the payload is not susceptible to acoustic excitation, OR that responses from acoustic excitation are screened through an integrated random vibration test, using methodologies described in Section 7.4.5 or other customer methodology, then an acoustic test is ADVISED (not required). • Otherwise, an acoustic test is REQUIRED. This test may be coupled with the activation inhibit verification as described in Section 7.4.6.
7.4.5 RANDOM VIBRATION Purpose: To ensure structural integrity of the payload during flight dynamic events and to verify power inhibit systems. Exposure to the random vibration environment ensures that primary and secondary structures, payload constituents, and smaller components are exposed to flight loads plus margin. This ensures mission and co-payload safety.
Verification: If customer demonstrates that the payload is not susceptible to random vibration excitation, OR that responses from random vibration excitation are screened through an integrated acoustic vibration test using methodologies described in Section 7.4.4 or other customer methodology, then only a random vibration component evaluation/analysis is REQUIRED per Section 7.4.5.1. (Integrated random vibration shaker testing is not recommended for medium- and heavy-class payloads.)
If verifying compliance to this environment through integrated random vibration testing, notching of the primary mode of the payload to avoid an over-test is acceptable. Notching is only permitted to prevent the payload from exceeding the quasi-static load levels defined in Section 7.5.2. Notching to protect secondary structure or constituent responses is not permitted because that would result in an under-test as related to flight environments. SpaceX recommends the use of the following methods for notching, in descending order of preference:
- Interface force limiting
- Acceleration response limiting using a flight-correlated analytical model
- Manual notching using a flight-correlated analytical model
Refer to industry-accepted standards for dynamic model correlation and notching for more information, such as NASA-HDBK-7004 and SMC-S-004.
7.4.5.1 COMPONENT-BY-COMPONENT RANDOM VIBRATION EVALUATION Applicability: Component-by-component evaluation of the random vibration environment is only required for payloads which do not have an integrated random vibration test or are not screened or qualified by an integrated acoustic test (if an acoustic test is required).
Method:
- Identify components susceptible to random vibration and/or near the interface plane and their in-plane and out-of-plane qualification levels. Components that are effectively screened by integrated tests such as sine vibration or acoustics should not be included in this assessment. Use the SpaceX-supplied environmental test template to perform the assessment.
- Compare each component's qualification level with the random vibration qualification levels (MPE + 3dB), as constructed from the limit levels in Section 7.5.6, or the component's qualification level with the predicted component response from the input random vibration qualification levels (MPE + 3dB). Identify deviations in the SpaceX-supplied environmental test template.
7.4.5.2 BAND SPLITTING Applicability: Band splitting may be used as part of the integrated random vibration test on a case-by-case basis. This is only permitted if the test facility requires a reduction in interface loads to meet the vibration shaker table force limitations. Band splitting must follow the following rules: • Maximum three bands • Minimum 1/3 Octave overlap between bands • No band splitting at or near a payload primary mode • The unit must be exposed to minimum workmanship levels (0.004 g²/Hz) in every test. Hence every test needs to have a frequency range of 20 – 2,000Hz, with one side of the band being reduced to minimum workmanship while the other is being tested to the full levels • All tests must be performed with the same unit • Qualification or protoqualification tests should target reaching the random vibration MPE grms as defined in Section 5.3.6.
7.4.6 ACTIVATION INHIBITS Purpose: To ensure that any deployable, transmission, and/or propulsion systems are isolated from sources of power up until payload separation. If a payload is designed to be powered OFF during ascent, to ensure the payload remains powered off until payload separation.
Verification: Testing is REQUIRED to verify that activation inhibits function as intended, as part of at least one integrated dynamic test (sine vibration, acoustic, or random vibration).
IMPORTANT: To verify that activation inhibit systems function as expected, all necessary power components and harnesses must be fully integrated and in a flight-like state. Batteries must be in their flight-like charge state and any RBF/SEI inhibits must be removed. Verification testing must show that power to the deployable, propulsion, and other hazardous secondary devices was successfully inhibited from a mechanical separation signal, and not because of other factors such as software delays. If a payload is designed to be powered OFF during ascent, the test must additionally show that power to the payload and any transmitting devices was successfully inhibited.
7.4.7 ELECTROMAGNETIC Purpose: To ensure that launch vehicle and launch site radiated emissions do not compromise the electrical integrity of the payload and to ensure that payload emissions do not compromise the safety of the launch vehicle or of co-payloads.
Verification: For payloads powered ON, testing or verification by analysis is REQUIRED to the electromagnetic compatibility test levels and durations defined in Table 7-1 in accordance with the environments defined in Section 5.3.7.
Verification by test may be performed in-house per MIL-STD-461 with supporting test documentation or obtained from an IEC-17025 accredited (or equivalent) test facility. Verification by analysis must provide electromagnetic circuit and wiring emissions analysis. Payloads that require power during ascent must inform SpaceX prior to launch services agreement (LSA) finalization.
7.4.8 VENTABLE VOLUMES Purpose: To limit the differential pressure experienced by the payload to ensure mission and co-payload safety.
Verification: Customers are ADVISED to conduct a venting analysis to the environment detailed in Section 5.3.8.
7.4.9 THERMAL Purpose: To ensure payloads are compatible with the thermal environments experienced during flight.
Verification: Testing is ADVISED to the combined thermal vacuum and thermal cycle test levels and durations defined in Table 7-1 in accordance with the environments defined in Section 5.3.9.
7.5 VERIFICATION FOR PRESSURE VESSELS AND SYSTEMS
7.5.1 PRESSURE VESSELS AND SYSTEMS GENERAL REQUIREMENTS
Purpose: To verify that pressure systems and components are qualified for flight and do not pose a hazard to ground personnel, co-payloads, and the launch vehicle.
Verification: For all pressurized systems, customers are REQUIRED to provide the following evidence:
- Document detailing system design criteria, MEOP derivation for flight (including thermal conditions), and ground cases for all pressurized components, features, and pressure vessels, including valve set points and relief device sizing
- System schematic using standard P&ID symbols and an (excel) tabulated parts list, including valves, reliefs, transducers, and reference designators for all parts
- Pressure vessel classification type
- Overall pressure vessel and pressure system qualification and acceptance strategy (see Sections 6.4 for relevant standards and test factors)
- Document detailing combined system test-like-you-fly exceptions between test and flight including rationale.
Systems that were previously approved by SpaceX may be exempt from providing this information as long as the pressure systems are identical to the systems previously reviewed and approved.
7.5.2 PRESSURE SYSTEM MATERIAL COMPATIBILITY
Purpose: To verify that pressure system materials are compatible with stored fluids, including propellants.
Verification: All customers are REQUIRED to provide a comprehensive list of pressure system materials for a compatibility assessment and comply with requirements as detailed in Section 6.4.5. The list must include:
• All pressure system materials within the pressure vessel, and all other pressurized components, AND • All working fluids, processing fluids, and expected/potential by-product fluids • For systems using HTP, the customer shall additionally provide: o An analysis predicting the decay rate and subsequent propellant tank pressure increase over a 60-day period. o Perform the analysis assuming a maximum allowable storage temp of 32°C (or worst-case temperature profile between payload propellant load and payload separation). o A list of materials that may contact HTP (including gas-side of positive expulsion diaphragm, if used), and must provide evidence that these materials are compatible with HTP.
7.5.3 LEAK TESTING
Purpose: To verify that pressure vessels and fully integrated pressure and propulsion systems do not pose a hazard to ground personnel and the launch vehicle.
Verification: Customers using pressure vessels and pressure systems are REQUIRED to perform leak testing at pressure vessel and pressure system level according to the standards called out in Section 6.4. System-level leak testing must be verified post environmental testing of the integrated payload.
FALCON USER'S GUIDE
8 FACILITIES
8.1 SPACEX EAST COAST LAUNCH FACILITIES
8.1.1 CAPE CANAVERAL SPACE FORCE STATION, FLORIDA
SpaceX operates a Falcon 9 launch site at Space Launch Complex 40 (SLC-40) at Cape Canaveral Space Force Station (CCSFS), Florida. SLC-40 was previously used by the U.S. Air Force for Titan III and Titan IV launches, and it has been extensively modified by SpaceX to accommodate the Falcon 9 launch vehicle.
The SLC-40 launch pad is located at 28' 33.72' (28.5620') N latitude, 80' 34.630' (80.5772') W longitude. Launch azimuths from SLC-40 support low- to mid-inclination LEO, high-inclination LEO orbits including polar orbits, and SSO, GTO, and Earth-escape orbits (Section 3.1).
SpaceX facilities at SLC-40 (Figure 8-1) include a launch vehicle integration hangar, propellant and pressurant storage and supply areas, a launch pad, and lightning towers. A SpaceX administrative facility is located adjacent to the launch complex.
1 Vehicle integration hangar 2 Hangar annex 3 Launch pad 4 Pad customer room
Figure 8-1: Space Launch Complex 40 at Cape Canaveral Space Force Station, Florida
SpaceX provides the use of an off-pad PPF as a standard service for CCSFS launch operations. CCSFS processing and launch operations, including PPF services, are described in Section 10.
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Figure 8-2: Falcon 9 launches from SLC-40 (left) with another Falcon 9 ready to launch from LC-39A (right)
8.1.2 KENNEDY SPACE CENTER, FLORIDA SpaceX operates a single Falcon 9 and Falcon Heavy launch site at Launch Complex 39A (LC-39A) at John F. Kennedy Space Center, located on Merritt Island along the central Florida coast. NASA constructed LC-39A (Figure 8-3) in the early 1960s to conduct missions under the legendary Apollo program and, later, with the space shuttle. In April 2014, SpaceX signed a 20-year lease with NASA for use of historic LC-39A. After facility upgrades in 2016, SpaceX completed its first LC-39A launch on February 19, 2017, with Falcon 9 launching CRS-10 as part of an ISS commercial resupply mission. SpaceX has since continued the pad's legacy, launching more than 100 Falcon 9 and Falcon Heavy missions from the pad.
The LC-39A launch pad is located at 28.6082° N latitude, 80.6041° W longitude. Launch azimuths from LC-39A support low- to mid-inclination LEO, high-inclination LEO orbits, GTO, and Earth-escape orbits (Section 3.1).
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Figure 8-3: LC-39A at Kennedy Space Center, Florida
Located 8 miles from the main KSC gate, at LC-39A (Figure 8-3) SpaceX constructed a hangar designed to receive, integrate, and roll out Falcon 9 and Falcon Heavy launch vehicles (Figure 8-3). With 55,000 sq ft of floor space and 34,000 sq ft of high bay space, the hangar contains 90-ton, 50-ton, and 30-ton bridge cranes as well as integration rails, electrical support equipment, and GN2, GHe, and other supplies for performing launch vehicle processing and integration with the encapsulated payload.
The maximum incline that the integrated launch vehicle experiences during transportation from the hanger to the pad is 2.9 degrees and occurs as it is moved up the ramp.
SpaceX provides the use of an off-load PPF (located on CCSFS) as a standard service for KSC launch operations. Payload processing and launch operations, including PPF services, are described in Section 10.
8.1.3 CCSFS & KSC PERSONNEL ACCOMMODATIONS
8.1.3.1 ACCESS AND BADGES CCSFS is a U.S. Space Force range with controlled access. SpaceX will facilitate pre-approval, badging, and access for customer personnel requiring access to CCSFS. Once badged, customer personnel will have access to the appropriate areas of the launch base. Non-U.S. persons are subject to additional pre-approval and escort requirements, which will be facilitated by SpaceX. For all customers processing their payloads at the SpaceX PPF, they will require CCSFS badges.
KSC is a NASA range with controlled access and different badging requirements and processes from CCSFS. For customers launching from LC-39A on KSC, SpaceX will facilitate badging for personnel who need access to hangar and pad facilities closer to the launch date.
8.1.3.2 TRANSPORTATION, LOGGING, AND SERVICES Customers typically fly commercial transport to Orlando International Airport, rent cars at the airport, and find lodging between Titusville and Cocoa Beach for the duration of their stay in Florida. Customer personnel who are U.S. persons may use their own rental cars for on-base transportation. For non-U.S. personnel with proper badging, SpaceX provides a shuttle service from an off-base parking lot to the various facilities used for launch and payload processing. The area offers a full range of services; your mission manager can provide you with additional detailed recommendations. SpaceX does not provide lodging for customer personnel during CCSFS or KSC launch campaigns.
8.1.3.3 AVAILABLE FACILITIES FOR CUSTOMERS As a standard service, SpaceX provides desk and office space for customer personnel at CCSFS or KSC in a facility separate from the PPF.
These facilities are available from customer arrival through launch + 3 days. Offices are provided with U.S-standard power (120V, 60 Hz), high-speed internet service. There are also designated control rooms which can be configured to monitor payload status during the launch campaign. Similar rooms are also available at the pad and in the hangar facility to support final system checks or countdown operations as needed.
SpaceX Launch and Landing Control is located at Hangar X. The facility is equipped with fiber-optic connections to the launch site and a connection into the launch site's main data system, allowing easy data transfers between the control facility, the pad, and the Range, along with required external users and agencies. A customer room that can accommodate eight people is provided within the facility for customer technical management personnel.
8.2 VANDENBERG SPACE FORCE BASE, CALIFORNIA SpaceX's California launch site is located within Vandenberg Space Force Base (VSFB). VSFB is an active installation of the U.S. Space Force, Space Launch Delta 30 (SLD-30), and is the location of the Western Range. Figure 8-4 shows VSFB with pertinent facilities labeled. On the southern half of the base, SpaceX Runway Operations (Annex and Hangar), Customer Support Building (CSB), and Pad EGSE Room are situated at Space Launch Complex 4 (SLC-4), while Falcon maintenance, fairing maintenance, and payload processing facility (PPF) are located at Space Launch Complex 6 (SLC-6), SpaceX Launch and Landing Control is located on the northern half of the base, along with Vandenberg Airfield (KVBG) and Lockheed Martin Astrotech payload processing facility (APF).
Figure 8-4: SpaceX Vandenberg Facilities
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FALCON USER'S GUIDE
Entry Control Point Customer Support Building Payload & Booster Processing Landing Zone SLC-4W Launch Pad SLC-4E
Figure 8-5. SLC-4E Site Overview
The SLC-4 East (SLC-4E) launch pad is located at 34' 37.92' (34.6320') N latitude, 120' 36.64' (120.6107') W longitude. Launch azimuths from SLC-4E support high-inclination LEO orbits, including polar orbits and SSO (Section 3.1). SLC-4E processing and launch operations are described in Section 10.
SLC-4 SE Shop B520 East Bay PPF West Bay P2 Maintenance B398 Porture Logistics B394 Offices B392 Boathouse North Gate A/C Astrodome Author Office Launch and Landing Center Lompac Gate Amanda Gate South Gate Space Launch Complex 4 Space Launch Complex 6
Figure 8-6. SLC-6 & Building 398
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At SLC-6, SpaceX has multiple support buildings. The primary SpaceX facilities currently in use at SLC-6 are Building 398 (Falcon 9 & fairing maintenance, Starlink & PPF), Building 394 (Shipping/Receiving), Building 520 (GSE), and an adjacent parking lot.
8.2.1 VSFB PERSONNEL ACCOMMODATIONS
8.2.1.1 ACCESS AND BADGES VSFB is a U.S. Space Force base with controlled access. SpaceX will facilitate pre-approval, badging, and access for customer personnel requiring access to VSFB. Once badged, customer personnel will have access to the appropriate areas of the launch base. Non-U.S. persons are subject to additional pre-approval and escort requirements, which will be facilitated by SpaceX.
8.2.1.2 TRANSPORTATION, LODGING AND SERVICES Customers typically fly commercial transport to Los Angeles International Airport (LAX), rent cars at the airport, and find lodging between Lompoc and Santa Maria for the duration of their stay in California. The drive between LAX and VSFB takes approximately 3 hours. Customers occasionally fly into Santa Barbara Airport (SBA) as well; the drive from SBA to VSFB takes about an hour. Customer personnel who are U.S. persons may use their own rental cars for on-base transportation SpaceX does not provide lodging for customer personnel during VSFB launch campaigns. The area offers a full range of services; your mission manager can provide you with additional detailed recommendations.
8.2.1.3 AVAILABLE FACILITIES FOR CUSTOMERS SpaceX may provide desk and office space for customer personnel at SLC-4E if required. Offices will be provided with U.S. standard power (120 V, 60 Hz) and high-speed internet service.
The customer room located at the pad, shown below in Figure 8-7, is located adjacent to the launch mount at SLC-4Ein the Launch Support Building (Building 715), which is a concrete reinforced bunker. The customer pad EGSE room is centrally located along the west side of the main pad building and equipped to support customer EGSE racks and GN2 purge interfaces for pad and day of launch operations.
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LAUNCH PAD Customer EGSE Room LAUNCH PAD 102 111 105 104 104 110 209 208 207 206 205 204 203 202 Antenna A/C Massasine Massasine 201 Transformer Room (B) 101A Transformer Room (A) 101B 101B 101A Women Men 118 118 118 104 105 106 107 Figure 8-7: Pad Customer Room
SpaceX Launch and Landing Control is in the northern section of VSFB (also called North Base), about 7 miles from the SLC-4E launch site and is where SpaceX performs day-of-launch operations with launch partners.
The Launch and Landing Control will accommodate a prearranged roster of customer personnel, with telemetry monitoring devices and audio consoles during a countdown rehearsal and on the day of launch. The Launch and
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Landing Control has rooms to support customer EGSE racks and workstations, and capabilities to route information to government partners.
Entrance Conference Space Customer EGSE Customer Rooms
Figure 8-8: Customer Control Rooms at SpaceX Launch and Landing Control
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Located 3.5 miles south-southwest of SLC-4 and originally built during the mid-1980s. Building 398 was originally designed to support Space Shuttle solid rocket booster (SRB) assembly and checkouts. It was then repurposed to support Atlas and Delta SRB assembly until it was leased by SpaceX. It has now become the center of Falcon 9 and payload fairing maintenance in the west bay, and payload processing in the east bay. Several support buildings around SLC-6 are now leased by SpaceX.
Figure 8-9: Building 398 at SLC-6
Figure 8-10: Building 398 PPF Map
Building 398 PPF is composed of an airlock and three independently operating processing bays with matching control/EGSE rooms supported by garment/changeout rooms for personnel entry, with connections to common areas
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shared with SpaceX personnel. Solid and hypergolic fuels are not supported due to facility permitting and explosive citing, but other types of gaseous/liquid fueling may be performed. Technical details on each processing bay may be found in the following sections, but a brief overview of each area is as follows:
• Airlock is used for hardware ingress and egress and is shared space with Starlink processing. • Bay 1 is separated by a 13' high security partition from the rest of the clean room. • Bays 2 and 3 have no permanent partition and are often treated as a single large processing bay. • Control rooms are nearly identical and are intended to operate independently. • Gowning rooms provide badge-controlled changeout areas for all three bays. • Conference rooms, café, and bathrooms are shared areas with Falcon, faring and payload processing.
Figure 8-11: Building 398 PPF Layout
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Figure 8-12: Building 398 Personnel and Hardware Access
8.3 HAWTHORNE, CALIFORNIA SpaceX's Dragon, Falcon 9, Falcon Heavy, and Merlin engine production facilities (Figure 8-13) are conveniently located in Hawthorne, CA, a few miles inland from Los Angeles International Airport. The design and manufacturing facility ranks among the largest manufacturing facilities in California. Facilities include multiple Falcon 9 and Falcon Heavy stage manufacturing stations, faring production and integration stations, and nine stations for final assembly of the Merlin engine.
Figure 8-13: SpaceX in Hawthorne, California
8.4 ROCKET DEVELOPMENT FACILITY—MCGREGOR, TEXAS Structural and propulsion testing are performed at the SpaceX Rocket Development Facility in McGregor, Texas (Figure 8-14). Conveniently located two hours from both Austin and Dallas, the site is staffed with test engineers, technicians, and management personnel. At this facility, every Falcon 9 and Falcon Heavy first and second stage and every Merlin engine undergoes acceptance testing before first flight. Merlin engine refurbishment work is also performed at SpaceX's three Falcon launch sites and at SpaceX's Rocket Development Facility.
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Figure 8-14: Rocket Development Facility in McGregor, Texas
8.5 GOVERNMENT OUTREACH AND LEGAL AFFAIRS—WASHINGTON, DC SpaceX's government outreach and licensing team is located in Washington, DC.
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9 MISSION INTEGRATION AND SERVICES
9.1 CONTRACTING Falcon launch services are available via direct contract with SpaceX and through certain managed procurement services. To begin your direct contract relationship with SpaceX, please contact the SpaceX Sales department. The Sales department will work with you to develop a launch services contract.
9.2 MISSION MANAGEMENT To streamline communication and ensure customer satisfaction, SpaceX provides each Falcon launch services customer with a single technical point of contact from contract award through launch (Figure 9-1). Your mission manager will be responsible for coordinating mission integration analysis and documentation deliverables, planning integration meetings and reports, conducting mission-unique design reviews (as required), and coordinating all integration and test activities associated with the mission. The mission manager also coordinates all aspects of launch vehicle production, Range and Range Safety integration, and all mission-required licensing leading up to the launch campaign. The mission manager works closely with the customer, SpaceX technical execution staff, and all associated licensing agencies in order to achieve a successful mission.
Customer Organization Customer Program Manager Customer / Spacecraft Teams
SPACEX Mission Manager SpaceX Leadership F9 Vehicle Engineering Avionics Build & Flight Reliability Production Launch
External Organization Range Safety FAA FCC
Figure 9-1: Mission Management Organization The mission manager will work with the customer to create a spacecraft-to-launch-vehicle interface control document (ICD); the master document for a Falcon launch vehicle mission. Following signature approval of the ICD, SpaceX maintains configuration control of the document.
Once the payload arrives at the launch site, a dedicated launch site mission manager will coordinate with the customer team regarding the execution of all launch site payload operations including logistics, physical accommodation of customer hardware and associated ground support equipment, hazardous operations, and combined operations.
9.3 STANDARD SERVICES As part of any Falcon launch service, SpaceX will:
• Provide personnel, services, hardware, equipment, documentation, analyses, and facilities to support mission planning, launch vehicle production and acceptance, payload integration, and launch.
• Secure required launch licensing, including Federal Aviation Administration (FAA) and State Department licenses, with input from the payload customer. (Note: Customers are responsible for any launch licenses specific to payload operation).
• Secure third-party liability insurance for the launch (Note: Customer retains responsibility for satellite insurance at all times).
• Provide all Range and safety documents for the payload provider to complete (per AFSPCMAN 91-710 and 14 CFR Part 400).
• Facilitate the Range and Range Safety integration process.
• Provide up to two sets of 37- or 61-pin satellite-to-launch-vehicle in-flight disconnect electrical connectors, or integrate customer-provided mission-unique connectors.
• Provide a 1,575-mm bolted interface compatible with the 62.01-in. diameter medium-class payload mechanical interface defined in the ELLV Standard Interface Specification, or a 2,624-mm bolted interface as defined in Section 4.1.5 and Appendix A: PAF Mechanical Interfaces.
• Provide one 937-mm or 1,194-mm or 1,666-mm (36.89-in. or 47.01-in. or 65.59-in.) adapter and low-shock clampband separation system, or integrate a customer-provided mission-unique separation system per Section 4.1.7 and Appendix B: Payload Mechanical, Electrical and Purge Standard interfaces.
• Provide an adapter and technical support for a mechanical interface compatibility verification test at a facility of the customer's choosing.
• Provide support to the customer for the verification of the payload by providing interface information, environments, and constraints to help customer ensure the validity of the payload verification activities. This support includes informal review and feedback on test levels and responses compared to the SpaceX-provided maximum predicted environments.
• Provide 48 cumulative hours of remote on-call SpaceX support for payload sinusoidal vibration testing, including nights and weekends. The customer shall give SpaceX at least one week's prior notice for documentation reviews and two weeks' prior notice for on-call test support.
• Provide transportation for the customer's spacecraft container and all ground support equipment (GSE) from the launch site landing location (as designated by SpaceX) to the spacecraft processing location, if necessary.
• Provide ISO Class 8 (Class 100,000 cleanroom) integration space for the payload and GSE prior to the scheduled launch date, including facilities and support to customer's hazardous operations.
• Provide certified mechanical GSE to support physical mating of the payload to the payload adapter, perform faring encapsulation, and integrate the encapsulated system with the launch vehicle.
• Process the launch vehicle, integrate and encapsulate the payload within the fairing, and test electrical interfaces with the payload.
• Provide conditioned air into the fairing during encapsulated ground processing.
Conduct a review of the countdown procedure and a verification of the countdown voice communication system prior to launch with the customer's launch operations team supported by SpaceX mission management.
Launch the payload into the specified orbit within the specified environmental constraints as defined in the Interface Control Document.
Perform 3-axis attitude control or spin-stabilized spacecraft separation.
Perform a collision avoidance maneuver (as required).
Verify spacecraft separation from the launch vehicle and provide an orbit injection report.
Deliver a final post-flight report, which will include payload separation confirmation, ephemeris, payload environments, significant events, and any mission-impacting anomalies.
A detailed SOW and deliverables list, including these standard services, will be developed during contract negotiation.
9.4 SCHEDULE
Table 9-1 provides a standard launch integration schedule, starting at contract signature and proceeding through the post-flight summary. A detailed schedule, including the required customer deliverables, is developed during contract negotiation.
Table 9-1: Standard Launch Integration Schedule
Estimated Schedule Title Purpose L-24 months Contract signature Provide authority to proceed with work L-18 months Mission integration kickoff Present the project schedule, a summary of mission requirements and proposed preliminary design solutions for any mission-unique requirements L-9 months Completion of mission integration analyses Deliver mission-unique design and analysis results to the customer and prepares the ICD for signature L-2 months Launch campaign readiness review Verify that all people, parts, and paper are ready for the shipment of the payload to the launch site and are ready to begin launch site activities L-1 day Launch readiness review Verify readiness to proceed with the countdown and launch, including launch Range and FAA concurrence Separation + TBD minutes Orbit injection report Delivers best-estimate state vector, attitude, and attitude rate based on initial data Launch + 8 weeks Flight report Reports the flight, environments, separation state, and a description of any mission-impacting anomalies and progress on their resolution
9.5 CUSTOMER DELIVERABLES
Table 9-2 and Table 9-3 provide an overview of standard documentation and information required from the customer. Note: These lists are not all-inclusive but rather represent minimum requirements. Depending on the specific payload, additional customer requirements may apply.
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Table 9-2: Required Documents and Data for All Payloads
Customer Deliverables Description Payload safety data Provides detailed payload information to support generation of Range Safety submittals, requirements tailoring and launch operations planning. Includes hazard analyses and reports, vehicle break-up models and detailed design/test information Finite-element and CAD models Used in coupled loads analyses and compatibility assessments. Specific format and other requirements are supplied during the mission integration process Environment analysis inputs Payload inputs for SpaceX environment analyses. Includes payload CAD, thermal model and others, as required Inputs to ICD Describes all mission-specific requirements and detailed launch vehicle to payload interfaces. SpaceX generates and controls the ICD, but input is required from the customer. ICD compliance verification is required prior to launch Environmental test statement and data Defines the payload provider's approach to qualification and acceptance testing, including general test philosophy, testing to be performed, objectives, test configuration, methods and schedule. Actual test procedures are not required. Specific qualification and acceptance test data may be required prior to launch to demonstrate compatibility with the launch environments Launch site operations plans and procedures Describes all aspects of mission activities to be performed at the launch site. Operating procedures must be submitted for all payload operations that are accomplished at the launch site and are subject to Range Safety review. Hazardous procedures must be approved by Range Safety Mission data Information in support of reviews is required throughout the mission integration process
Table 9-3: Additional Required Documents and Data for Non-US Persons and Non-US Government payloads
Customer Deliverables Description FAA payload determination information Non-US government payloads must be reviewed by the FAA to determine whether their launch would jeopardize public safety and other US interests (Title 14 CFR part 415 subpart D). Payload providers may need to provide additional information to enable SpaceX to submit an application for review Launch site visitor information To obtain the appropriate access, SpaceX requires information for all customer personnel to be submitted prior to visiting the launch site Launch site GSE details Details on SCE that a non-US customer plans to bring to the launch site are required for import/export compliance
9.5.1 PAYLOAD LICENSING AND REGISTRATION Customer will flow down its responsibilities relating to payload licensing and registration (including registration pursuant to the Convention on Registration of Objects Launched into Outer Space) to each of its customers, in writing. Evidence of proper flow-down will be provided to SpaceX upon request.
9.5.2 COORDINATION WITH SPACE SITUATIONAL AWARENESS
9.5.2.1 PRE-LAUNCH REGISTRATION The customer is responsible for registering all deployed objects with the 18th SPCs to assist with tracking and identification. Information can be found at https://www.space-track.org on how to register a payload and the process for communicating and coordinating with the 18th SPCs. If required, SpaceX can provide direct contact information with personnel from the 18th SPCs. Additionally, if any of the payload's operational, transfer, or disposal orbits cross the ISS altitude, NASA requests direct coordination at jsc-dl-topo.wwg@mail.nasa.gov for ISS conjunction deconfliction.
SpaceX also recommends customers consider adopting and following the best practices outlined in the NASA Spacecraft Conjunction Assessment and Collision Avoidance Best Practices Handbook, which can be found at https://modis3.gsfc.nasa.gov/OCE_docs/OCE_50.pdf.
9.5.2.2 POST-LAUNCH REGISTRATION The customer is responsible for publishing forward predicted satellite ephemerides with covariance to:
• Space-Track: https://www.space-track.org • SpaceX Space Traffic Coordination: Details at https://docs.space-safety.starlink.com/ contact space-safety-onboarding@spacex.com for pre-launch setup and testing.
An important benchmark is uploading ephemerides within Launch + 3 hours when the Launch COLA analysis expires. SpaceX additionally submits post-launch ephemeris for each deployment event based on Stage 2's state and estimated deployment impulse, but customer-provided orbit determination from satellite telemetry (e.g., from GPS) is more accurate.
If customers are unable to generate propagated ephemeris and covariance, SpaceX strongly recommends they work with a commercial provider to contract for this work (SpaceX can provide recommendations). Publishing predictions drastically improves and accelerates the cataloging process by USSPACECOM and enhances collision avoidance screening.
9.5.3 ENTRY AND EXIT VISAS The customer is responsible for obtaining any visas required for customer's personnel, including customer's related third parties and guests. SpaceX can provide letters of invitation for customer's launch campaign personnel to support the issuance of U.S. entry visas by the U.S. Department of State.
9.5.4 ANOMALY, MISHAP, ACCIDENT, OR OTHER EVENT In the event of an anomaly, mishap, accident, or other event resulting in property damage, bodily injury or other loss, customer will cooperate with SpaceX, any insurers, and federal, state, and local government agencies, in their respective investigations of the event, including the completion of witness statements, if applicable. Such cooperation will include providing all data arising out of or related to the payload, any ground support, and any activities relating to the performance of the Agreement, reasonably requested by SpaceX, the insurers, or federal, state, and local agencies. Notwithstanding customer's obligation to cooperate, SpaceX may use reasonable means to independently access such information. Customer and customer's customers may not make any public comment, announcement, or other disclosure regarding such event without SpaceX's review and approval.
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10 OPERATIONS
Falcon launch vehicle operations are described in this section for launches from CCSFS and KSC (Section 8.1) and VSFB (Section 8.2). SpaceX launch operations are designed for rapid response. Customers are strongly encouraged to develop launch readiness capabilities and timelines consistent with a rapid prelaunch concept of operations.
10.1 OVERVIEW AND SCHEDULE The Falcon launch vehicle system and associated operations have been designed for minimal complexity and minimal time at the pad (Figure 10-1). Customer payload processing is performed in a PPF. After completion of standalone spacecraft operations (typically over a 15-day period) by L-7 days, SpaceX performs the adapter mate and faring encapsulation at the PPF. The spacecraft is then transported to the integration hangar. Final processing of the launch vehicle occurs in the integration hangar at the launch complex prior to being loaded on the transporter-erector. The launch vehicle is processed in the integration hangar at the launch complex and then loaded on the transporter-erector. The encapsulated assembly is mated to the launch vehicle at approximately L-2 days, followed by end-to-end system checkouts. Falcon 9 and Falcon Heavy systems are designed for rollout and launch on the same day, but SpaceX can perform an earlier rollout and conduct a longer countdown if required.
Figure 10-1: Reference Falcon Launch Vehicle Processing, Integration, and Launch Operations Schedule
10.2 SPACECRAFT DELIVERY AND TRANSPORTATION For standard service processing and integration, payloads should be delivered to the launch site four weeks prior to launch. Alternative delivery schedules can be arranged as a nonstandard service.
Customers typically deliver their payloads via air, maritime, or ground transport.
The Eastern Range offers two convenient landing locations on base for customers delivering their payloads and associated equipment via air transport: the Shuttle Landing Facility at KSC (also known as the Launch and Landing Facility) and the CCSFS Skid Strip, as well as several other airports in the vicinity. Maritime delivery near Port Canaveral is also an option.
Vandenberg provides one landing location at the VSFB airfield, approximately 14 miles north of the launch complex. Non-U.S. payloads coming to VSFB via the airfield must clear customs at LAX or another port of entry prior to arrival at VSFB.
As a standard service, SpaceX will arrange for the customer's spacecraft container and all associated test and support equipment to be offloaded from the aircraft and transported to the PPF, provided the aircraft lands at a SpaceX designated airport. Ground transport services can also be provided by AstroTech Space Operations or Spaceport
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Systems International; SpaceX can facilitate these as a nonstandard service. For arrivals from airports located off base or via sea, customers are responsible for arranging transport up to base security gates.
10.3 SPACECRAFT PROCESSING SpaceX provides an ISO Class 8 (Class 100,000) PPF for processing customer spacecraft, including equipment unloading, unpacking/packing, final assembly, nonhazardous flight preparations, and payload checkout. The PPF is available to customers from four weeks prior to launch, with 16 hours per day standard availability and access during that period. Additional time in the PPF may be available as a nonstandard service. The PPF layouts for VSFB and CCSFS are shown in Figure 10-2, Figure 10-3, Figure 10-4, and Figure 10-5 respectively.
Figure 10-2: VSFB Annex and Integration Hangar Layout
Figure 10-3: VSFB Building 398 for Non-Hypergol Payloads Floor Plan
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East Integration Cell East Transfer Aile East Equipment Aile Concrete Apron East Canister Aile Highbay
Figure 10-4: CCSFS PPF East Bay Floor Plan
Highbay
Canister Airlock Holding Cell Women's RR North Guestroom Room Transfer Aile Equipment Airlock North Trailer Room North Customer EOSK Room North Integration Cell South Integration Cell South Customer EOSK Room South Trailer Room Hurricane Bracing Area
Figure 10-5: CCSFS PPF West Bay Floor Plan
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Services and equipment provided for satellite processing within the PPF are outlined in Table 10-1. Additional space is provided for customer GSE and operations personnel. A facility HVAC system maintains PPF environments. SpaceX will continuously monitor relative humidity, temperature, and cleanliness in the PPF. Air cleanliness with measured monitoring using witness plates is available as a nonstandard service for its GSE to interface with PPF power. SpaceX can supply alternative power sources as a nonstandard service.
The PPF (excluding Building 398 in Vandenberg) is also designed to accommodate hazardous operations such as hypergolic propellant loading and ordnance installation. Any required fueling operations will be performed by customer personnel with assistance from SpaceX personnel. All personnel must use certified SCAPE suits, pass a physical medical evaluation, and attend SCAPE training classes.
All spacecraft processing operations within the PPF must be completed by L-7 days to allow for mating to the payload adapter, fairing encapsulation, and transportation to the launch vehicle integration hangar in preparation for launch.
Table 10-1: Services and Equipment for Payload Processing
CCSFS VSFB
Clean Room
Dimensions No less than 9.1 m x 9.1 m (30 ft x 30 ft) of dehumidified spacecraft processing floor space, including for payload fueling operations. No less than 29.2 m x 20.7 m floor size (95.8 ft x 67.9 ft)
Exterior door No less than 10.36 m high x 5.76 m wide (34 ft x 18 ft in) No less than 6.01 m high x 6.01 m wide (20 ft x 20 ft)
Temp/Clean See Table 5-2 (PPF facility HVAC) See Table 5-2 (PPF facility HVAC)
Overhead Crane
Quantity 2 2
Max hook height East PPF: Airlock Crane: 10.4 m (34 ft) Cleanroom Crane: 30.5 m (100 ft) 22.03 m (72.28 ft), airlock and cleanroom
West PPF: Airlock Crane: 12.2 m (40 ft) Cleanroom Crane: 30.5 m (100 ft)
Capacity East PPF: Airlock Crane: 15,000 kg (15 T) Cleanroom Crane: 50,000 kg (50 T) Airlock Crane: 31,751 kg (35 T)
West PPF: Airlock Crane: 5,000 kg (5 T) Cleanroom: 50,000 kg (50 T)
Host Speed (min/max) Both certified for hypergolic lifting 50.4 cm/min (0.67 ft/min), airlock 27.4 cm/min (0.1 ft/min), cleanroom 0.61 cm/min (0.02 ft/min), airlock and cleanroom
Operation modes Independent Independent
Access Equipment 45-ft boom lifts, pallet jack, lifting hardware, ladders, movable platforms
Electrical 120V 1-phase, 120/208V 3-phase, and 480V 3-phase service 120V 1-phase and 120/208V 3-phase service
50 Hz AC 220/380V – WYE, 3-Phase, 5-Wire with UPS back up 220/380V – WYE, 3-Phase, 4-Wire with UPS backup
Grounding Per MIL-STD-1542 Per MIL-STD-1542
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CCSFS VSFB
GN₂ Supply Quality MIL-PRF-27401, Grade B MIL-PRF-27401, Grade B Pressure 28,613 kPa (4,150 psi) 34,473 kPa (5,000 psi) Flow rate 1,699.2 Nm²/hr (1,000 scfm) 1,699.2 Nm²/hr (1,000 scfm)
Helium Supply Quality MIL-PRF-27407, Grade A MIL-PRF-27407B, Type 1, Grade B Pressure 39,300 kPa (5,700 psi) 41,368 kPa (6,000 psi) Flow rate 1,699.2 Nm²/hr (1,000 scfm) 1,699.2 Nm²/hr (1,000 scfm)
Compressed Air Supply Pressure 827 kPa (120 psi) 862 kPa (125 psi)
Communications Administrative phone VOIP phones VOIP phones Paging system Yes Yes Area warning system Yes Yes
Security Locking facility Yes Yes Launch site badges Yes Yes Video monitoring Yes Yes
As an alternative nonstandard service, SpaceX can arrange the use of commercial processing facilities near CCSFS or VSFB for payload processing. If a payload is processed at a facility other than the SpaceX provided PPF, SpaceX can provide environmentally controlled transportation from that facility to the launch vehicle integration hangar.
10.4 JOINT OPERATIONS AND INTEGRATION Joint operations begin seven days before launch. Payload attachment to the PAF and fairing encapsulation are performed by SpaceX within the PPF (Figure 10-6). Fairing encapsulation is performed in the vertical orientation. Transportation is performed in the vertical orientation, and environmental control is provided throughout the transportation activity. Once at the launch vehicle integration hangar, the encapsulated assembly is rotated to horizontal and mated with the launch vehicle already positioned on its transporter-erector.
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Mate Payload Encapsulation Remove Encapsulation Fixtures Pre-Mate to Launch Vehicle
Figure 10-6: Payload Encapsulation and Integration Sequence
Once the encapsulated assembly is mated to the launch vehicle, the hangar facility HVAC system is connected via a fairing air conditioning duct to maintain environmental control inside the fairing. The payload is then reconnected to EGSE (if required) and electrical interfaces are verified. At this point, the integrated launch vehicle is ready for rollout and launch (Figure 10-7).
Figure 10-7: Falcon 9 on the Transporter-Erector in the Integration Hangar and During Rollout
10.5 LAUNCH OPERATIONS
10.5.1 ORGANIZATION The main decision-making roles and responsibilities for launch operations are shown in Table 10-2. Note that this list is not inclusive of all roles participating in the launch but is rather limited to those that have direct input in the decisionmaking process.
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Table 10-2: Launch Control Organization Position Abbreviation Organization Chief Engineer CE SpaceX Mission Manager MM SpaceX Launch Director LD SpaceX Range Operation Commander ROC Launch Range Operations Safety Manager OSM Launch Range
The launch control organization and its lines of decision-making are shown in Figure 10-8. The details of the launch control organization are somewhat dependent on the mission and customer. A customer launch director, representing the customer organization and the payload, will interface with the SpaceX mission manager and coordinate the launch countdown operations. The customer launch director may either be co-located with the SpaceX mission manager in the Launch and Landing Control), or in an adjacent customer control room.
Figure 10-8: Launch Control Organization
10.5.2 SPACECRAFT CONTROL CENTER SpaceX provides a spacecraft control center for remote payload command and control operations during the launch countdown. Customer EGSE and spacecraft personnel will be located within the spacecraft control center during launch. The spacecraft control center includes full fiber-optic voice, video, and internet connectivity to the launch site, SpaceX Launch and Landing Control (Section 10.5.3), and other Range facilities.
10.5.3 LAUNCH AND LANDING CONTROL The SpaceX console design is modular and expandable (Figure 10-9). SpaceX uses standard modern computer and display systems with software designed for industrial system control. Consoles also include voice communications capabilities, including voice nets, voice-over-internet protocol (IP) integration with remote sites, and IP phones. Video viewing and control are provided using the video-over-IP systems.
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Figure 10-9: SpaceX Launch and Landing Control at the Eastern Range (left) and the Western Range (right)
10.5.4 ROLLOUT, ERECTION, AND PAD OPERATIONS After readiness is verified, the integrated Falcon vehicle may be rolled out from the hangar to the pad on its transportererector (Figure 10-10). Once the vehicle is at the pad, the payload air conditioning system is reconnected, maintaining environmental control through liftoff. Electrical connectivity is provided via ground cables (Section 4.4.5). The vehicle will typically be erected only once, although the capability exists to easily return it to a horizontal orientation if necessary.
Figure 10-10: Launch Vehicle Rollout and Erection Physical access to the payload while the vehicle is outside of the hangar requires special accommodations and is a nonstandard service. Payload access is not available while the launch vehicle is vertical.
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10.5.5 COUNTDOWN Early in the countdown, the vehicle performs LOX, RP-1, and pressurant loading, and it executes a series of vehicle and Range checkouts. The transporter-erector strongback is retracted just prior to launch. Automated software sequencers control all critical Falcon vehicle functions during terminal countdown. Final launch activities include verifying flight termination system status, transferring to internal power, and activating the transmitters. Engine ignition occurs shortly before liftoff, while the vehicle is held down at the base via hydraulic clamps. The flight computer evaluates engine ignition and full-power performance during the prelaunch hold-down, and if nominal criteria are satisfied, the hydraulic release system is activated at T-0. A safe shutdown is executed should any off-nominal condition be detected.
10.5.6 RECYCLE AND SCRUB Falcon launch vehicle systems and operations have been designed to enable recycle operations when appropriate. In the event of a launch scrub, the transporter-erector and launch vehicle will typically stay vertical. Remaining on the pad provides uninterrupted payload-to-EGSE connectivity through the T-0 umbilical, eliminating the need to relocate EGSE from the instrumentation bay to the hangar after a scrub. However, for any long-duration launch postponements, SpaceX will return the vehicle on the transporter-erector to the hangar.
10.6 FLIGHT OPERATIONS
10.6.1 LIFTOFF AND ASCENT During first stage powered flight, Falcon's flight computers will command shutdown of the nine first stage engines based on achieving the target velocity or on remaining propellant levels. The second stage burns an additional five to six minutes to reach initial orbit, with deployment of the faring typically taking place early in second stage flight. Subsequent operations are unique to each mission but may include multiple coast-and-restart phases as well as multiple spacecraft separation events.
10.6.2 SPACECRAFT SEPARATION After reaching the spacecraft injection orbit and attitude, the Falcon vehicle issues redundant spacecraft separation commands, providing the electrical impulses necessary to initiate spacecraft separation. Indication of separation is typically available via second stage telemetry.
10.6.3 CONTAMINATION AND COLLISION AVOIDANCE If a contamination and collision avoidance maneuver (CCAM) is necessary following payload deploy to ensure needed separation distance from the deployed payload and Falcon's second stage, the second stage can perform a CCAM if deemed necessary. A CCAM is provided as a standard service for individual primary payloads. For multi-manifested and secondary payloads, please contact SpaceX regarding collision avoidance requirements.
10.6.4 POST-LAUNCH REPORTS SpaceX will provide a quick-look orbit injection report to the customer shortly after spacecraft separation, including a best-estimate spacecraft separation state vector. A final, detailed post-flight report is provided within eight weeks of launch.
10.6.5 DISPOSAL SpaceX makes every effort to mitigate space debris by responsibly passivating and disposing of hardware on orbit. Customer-specific requirements on disposal may impose modest reductions to the performance specifications indicated in Section 3.2.
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10.7 SAMPLE MISSION PROFILE Sample mission profiles for Falcon 9 and Falcon Heavy are shown in Figure 10-11 and Figure 10-12, and sample Falcon 9 timelines for a GTO mission and LEO mission are shown in Table 10-3 and Table 10-4. Note: each flight profile is unique and will differ from these examples.
FAIRING SEPARATION FLIP MANEVER STAGE SEPARATION ASCENT LAUNCH FAIRING SEPARATION GRID FINS DEPLOY ENTRY BURN AERODYNAMIC GUIDANCE VERTICAL LANDING AUTOMOVES DRONESHIP LANDING
Figure 10-11: Falcon 9 Sample Mission Profile
BOOSTBACK BURN GRID FINS DEPLOY BOOSTER SEPARATION ENTRY BURN AERODYNAMIC GUIDANCE VERTICAL LANDING LANDING ZONES
Figure 10-12: Falcon Heavy Sample Mission Profile
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Table 10-3: Falcon 9 Sample Flight Timeline—GTO Mission
Mission Elapsed Time Event T – 3 s Engine start sequence T + 0 Liftoff T + 74 s Maximum dynamic pressure (max Q) T + 147 s Main engine cutoff (MECO) T + 151 s Stage separation T + 158 s Second engine start-1 (SES-1) T + 222 s Fairing separation T + 484 s Second engine cutoff 1 (SECO-1) T + 1636 s Second engine start-2 (SES-2) T + 1696 s Second engine cutoff-2 (SECO-2) T + 1996 s Spacecraft separation
Table 10-4: Falcon 9 Sample Flight Timeline—LEO Mission
Mission Elapsed Time Event T – 3 s Engine start sequence T + 0 Liftoff T + 67 s Maximum dynamic pressure (max Q) T + 145 s Main engine cutoff (MECO) T + 148 s Stage separation T + 156 s Second engine start-1 (SES-1) T + 195 s Fairing separation T + 514 s Second engine cutoff-1 (SECO-1) T + 3086 s Second engine start-2 (SES-2) T + 3090 s Second engine cutoff-2 (SECO-2) T + 3390 s Spacecraft separation
© Space Exploration Technologies Corp. All rights reserved.
11 SAFETY
11.1 SAFETY REQUIREMENTS Falcon customers are required to meet AFSPCMAN 91-710 Range User's Manual and FAA 14 CFR Part 400 requirements in the design and operation of their flight and ground systems. These requirements encompass mechanical design, electrical design, fluid and pressurant systems, lifting and handling systems, ordinance and RF systems, GSE, and other design and operational features. SpaceX will serve as the safety liaison between the customer and the Range.
11.2 HAZARDOUS SYSTEMS AND OPERATIONS Most launch ranges consider hazardous systems and operations to include ordnance operations, pressurized systems that operate below a 4-to-1 safety factor, lifting operations, operations or systems that include toxic or hazardous materials, high-power RF systems and laser systems, and a variety of other systems and operations. The details of the system design and its operation will determine whether the system or related operations are considered hazardous. Typically, additional precautions are required for operating systems that are considered hazardous, such as redundant valving between pressurant and propellant. Additional precautions will be determined during the safety approval process with SpaceX and the Range. All hazardous operations require procedures that are approved by both SpaceX and the Range prior to execution. Ordnance operations, in particular, require coordination to provide reduced RF environments, cleared areas, safety support, and other requirements.
11.3 WAIVERS For systems or operations that do not meet safety requirements but are believed to be acceptable for ground operations and launch, a waiver is typically produced for approval by the Range safety authority. Waivers require considerable coordination and are considered a last resort; they should not be considered a standard practice.
12 CONTACT INFORMATION If you are considering SpaceX launch services, please contact the SpaceX Sales department:
SpaceX Attention: Sales 1 Rocket Rd. Hawthorne, CA 90250 sales@spacex.com
APPENDIX A: PAF MECHANICAL INTERFACES
0 Space Exploration Technologies Corp. All rights reserved.
LV + Y
DETAIL A
GENERAL NOTES
- FASTMEN NEED TO BE INSTALLED FROM THE PLA STIDE OF THE INTERFACE. IF HARDWARE NEEDS TO BE INSTALLED IN THE OPPOSITE DIRECTION A SPACER MAY BE REQUIRED.
VIEW FIND LOOKING ATT LV + X AXIS IS OUT OF THE PAGE
Figure A-1: 1.575-mm PAF Interface Drawing
© Space Exploration Technologies Corp. All rights reserved.
FALCON USER'S GUIDE
B Space Exploration Technologies Corp. All rights reserved.
D D Hole 2 D Hole 1 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 246 D Hole 24
FALCON USER'S GUIDE
B Space Exploration Technologies Corp. All rights reserved.
2X[54,116] [1374,54]
4X[46,192] [1373,27]
LV+Y
B
VIEW FND LOOKING AFT LV IX AXIS IS OUT OF THE PAGE
96X(D) .3641.000 8.791.000 [2.000] [51.000]
DETAIL A
SECTION B-B
500+.010 12.70*10.25
GENERAL NOTES:
- FASTENERS NEED TO BE INSTALLED FROM THE PLA SIDE OF THE INTERFACE.
- THIS STRAINING CONTAINS DUAL DIMENSIONS. DIMENSIONS SHOWN IN BRACKETS [XK] ARE IN MILLIMETERS AND ARE FOR REFERENCE ONLY.
- PLEASE CONTACT SPACEX FOR HOLD TOLERANCE REQUIREMENTS IF USING THE SQUARE PAF INTERFACE.
IMPERIAL B 3BVLB SQUARE PAF DETERMINE CONTROL DOCUMENT #01
Figure A-3: Square PAF Interface Drawing
© Space Exploration Technologies Corp. All rights reserved.
APPENDIX B: PAYLOAD MECHANICAL, ELECTRICAL AND PURGE STANDARD INTERFACES
STRUCTURAL INTERFACE 937 CLAMPBAND
S/C FRAME FOR SECTION LESS THAN 25.4mm ABOVE INTERFACE: AREA = 345 + 115 mm² T = 40.305 + 10.850 mm² F = 10.065 + 2.585 mm² PROPERTIES CALCULATED AUTOMATIC SECTION CG
MATERIAL: ANV ALLURTAME ALLOY FINISH ON ALL INTERFACING FEATURES: CHEMICAL CONVERSION COATING PER MIL-DTL-5541 CLASS 1A OR EQUIVALENT
ENGRAVED MARK 180° APPART FROM OPENING DEVICE
937 926.2MAX 4.01MIN 9.53+0.2 APPLICABLE LENGTH FOR AREA AND STIFFNESS R 6+0.25 R 1.27+0.25 8.85 1.3+0.1 876.3+0.25 913+0.25 15'+0.025 5.84
3.34+0.03 R 0.5 2XR 0.13+0.13 1.78+0.13 0.254 0.2+0.1 X 45' 0.4+0.1 X 45' 2X8.1'+0.5' DETAIL B ALL DIMENSIONS IN MILLIMETERS
Figure B-1: 937-mm Clampband Mechanical Interface
© Space Exploration Technologies Corp. All rights reserved.
CONFIGURATION INTERFACE 937 CLAMPBAND
UP TO 12X SPRINGS, SPACED AS SHOWN 603 X 203 ENERGIES STANDARD
087.5 SEPARATION SPRING CENTERLINE
PAYLOAD ADAPTER X+ AXIS
CLAMP BAND SEPARATION DEVICE LOCATION
2X ELECTRICAL CONNECTORS STANDARD, 180 APART 3X PAIRED LOCATIONS AS SHOWN 12.0mm STATIC ADJUSTABILITY PER LOCATION
01210.2 ELECTRICAL CONNECTOR CENTERLINE
SPACEECRAFT CONNECTOR AFT FACE 85.0T0 SEPARATION PLANE IF USING DBAS 70-61 PIN OR DB179 EQUIVALENT
SECTION D-D SPACINGS SHOWN FOR 61 PIN DBAS 70/79 PAIRING OR DB179 EQUIVALENT
CONNECTOR KEYWAY RADIAL OUT
DETAIL ALL LOCATIONS
ALL DIMENSIONS IN MILLIMETERS
VIEW FROM SPACECRAFT SIDE LOOKING TOWARDS LAUNCH VEHICLE
Figure B-2: 937-mm Clampband Electrical Interface
© Space Exploration Technologies Corp. All rights reserved.
CONFIGURATION INTERFACE 937 CLAMPBAND
G 159N MAX FORCE 3.45BANG (50PSIG) MAX PRESSURE 173XM/MM (10001BF/IN) MIN STIFFNESS SPACECRAFT PURGE INTERFACE TO SEPARATION PLANE SEPARATION PLANE
PAYLOAD ADAPTER X+ AXIS
SECTION F-F
6 POSITABLE PURGE POSITIONS INTERCHANGEABLE WITH ELECTRICAL CONNECTORS
PAYLOAD ADAPTER X+ AXIS
PURGE POSITION
SPACECRAFT INTERFACE
22.9MIN GASKET CONTACT AREA 6.15INLET
0.8
LAUNCH VEHICLE INTERFACE
DETAIL G ALL LOCATIONS
ALL DIMENSIONS IN MILLIMETERS
Figure B-3: 937-mm Clampband Purge Interface (Nonstandard Service)
© Space Exploration Technologies Corp. All rights reserved.
FALCON USER'S GUIDE
STRUCTURAL INTERFACE 1194 CLAMPBAND
S/C FRAME FOR SECTION LESS THAN 25.4mm ABOVE INTERFACE: AREA = 208*110 mm L = 38,580 * 26,580 mm² T = 10,500 * 8,750 mm² PROPERTIES CALCULATED ADJT THE SECTION CG MATERIAL : ANY ALUMINUM ALLOY FINISH ON ALL INTERFACING FERMENTS CHEMICAL CONVERSION COATING PER MIL-OIL-5544 CLASS 1A OR EQUIVALENT
ENGRAVED MARK 180° APPAINT FROM OPENING DEVICE
(25) APPLICABLE LENGTH FOR AREA AND STIFFNESS
R 4.50.25 R 4.50.12 0.025 E
3.07*0.03
R 0.5
1.52*0.05
1.6 F 150.25 1.6 F 0.30 0.03 / 10 2X100.5²
2X10*0.5²
DETAIL B ALL DIMENSIONS IN MILLIMETERS
Figure B-4: 1194-mm Clampband Mechanical Interface
© Space Exploration Technologies Corp. All rights reserved.
FALCON USER'S GUIDE
CONFIGURATION INTERFACE 1194 CLAMPBAND
UP TO 12X SPRINGS, SPACED AS SHOWN 603 & 203 ENERGIES STANDARD 1161 SEPARATION SPRING CENTERLINE
PAYLOAD ADAPTER +XPLA AXIS
72.2510.38 SPACEX SIDE DBAS 9.524 PIN CONNECTOR OR SPACEX SIDE SHIMMABLE TO WITHIN 10.5mm
SPACECRAFT CONNECTOR AFT FACE 85.910 SEPARATION PLANE ET USING DBAS 70-61 PIN OR DB179 EQUIVALENT
SECTION D-D SPACINGS SHOWN FOR 61 PIN DBAS 70/79 PAIRING OR DB179 EQUIVALENT
2X ELECTRICAL CONNECTORS STANDARD, 180° APART 39 PRAISED LOCATIONS AS SHOWN =2.0mm STATIC ADJUSTABILITY PER LOCATION
CLAMP BAND SEPARATION DEVICE LOCATION
PAYLOAD ADAPTER +XPLA AXIS 1578.25 ELECTRICAL CONNECTOR CENTERLINE
CONNECTOR KEYWAY RADIAL OUT
DETAIL ALL LOCATIONS
ALL DIMENSIONS IN MILLIMETERS
Figure B-5: 1194-mm Clampband Electrical Interface
© Space Exploration Technologies Corp. All rights reserved.
FALCON USER'S GUIDE
CONFIGURATION INTERFACE 1104 CLAMPBAND
G 159N MAX FORCE 3 AXIAL (600/510) MAX TRECURE 175N/MM (180N/LF/IN) MIN STIFFNESS SPACECRAFT PURGE INTERFACE TO SEPARATION PLANE SEPARATION PLANE
PAYLOAD ADAPTER Y+ AXIS
SECTION F-F
6 POSSIBLE PURGE POSITIONS INTERCHANGEABLE WITH ELECTRICAL CONNECTORS
PAYLOAD ADAPTER X+ AXIS
1578.25 PURGE POSITION
SPACECRAFT INTERFACE
LAUNCH VEHICLE INTERFACE
DETAIL G ALL LOCATIONS ALL DIMENSIONS IN MILLIMETERS
Figure B-6: 1194-mm Clampband Purge Interface (Nonstandard Service)
© Space Exploration Technologies Corp. All rights reserved.
STRUCTURAL INTERFACE 1666 CLAMPBAND
S/C FRAME FOR SECTION LESS THAN 25.4mm ABOVE INTERFACE: AREA = 580 mm × 69 mm = 35,000 mm² × 959 mm² = 25,000 mm² × 2,528 mm² PROPERTIES CALCULATED AND THE SECTION CG
MATERIAL : ANY ALUMINUM ALLOY FINISH ON ALL INTERFACING FEATURES: CHEMICAL CONVERSION COATING PER MIL-DYL-5441 CLASS 1A OR EQUIVALENT
ENGRAVED MARK 180° APPART FROM OPENING DEVICE
[25] APPLICABLE LENGTH FOR AREA AND STIFFNESS
R 4.5 ± 0.25
B
5.72
11 ± 0.15
2X R 0.3 ± 0.1
1.52 ± 0.05
0.76
0.2 ± 0.1 X 45
0.4 ± 0.1 X 45
A
2 ± 0.2
1633 ± 0.5
R 3
E
1.6
0.38
0.03 / 210
DETAIL B
SECTION A-A
1582 ± 0.5
Figure B-7: 1666-mm Clampband Mechanical Interface
© Space Exploration Technologies Corp. All rights reserved.
FALCON USER'S GUIDE
CONFIGURATION INTERFACE 1666 CLAMPBAND
UP TO 8X SPRINGS, SPACED AS SHOWN 403 & 203 ENERGIES STANDARD
D 8X45° 1600 SEPARATION SPRING CENTERLINE
PAYLOAD ADAPTER Y+ AXIS
135° 90° 22.5°
C CLAMP BAND SEPARATION DEVICE LOCATION
2X ELECTRICAL CONNECTORS STANDARD, 180° AJART 3X PAIRED LOCATIONS AS SHOWN 12.2mm STATIC ADJUSTABILITY PER LOCATION
02800 ELECTRICAL CONNECTOR CENTERLINE
SPACECRAFT CONNECTOR AFT FACE 85.80TD SEPARATION PLANE IF USING DBAS 70-61 PIN OR DB179 EQUIVALENT
SECTION D-D SPACINGS SHOWN FOR 61 PIN DBAS 70/79 PAIRING OR DB179 EQUIVALENT
CONNECTOR KEYWAY RADIAL OUT
DETAIL ALL LOCATIONS
VIEW FROM SPACECRAFT SIDE LOOKING TOWARDS LAUNCH VEHICLE
ALL DIMENSIONS IN MILLIMETERS
Figure B-8:1666-mm Clampband Electrical Interface
© Space Exploration Technologies Corp. All rights reserved.
FALCON USER'S GUIDE
CONFIGURATION INTERFACE 1666 CLAMPBAND
G 15N MAX FORCE 3.45BARG (34PSI0) MAX PRESSURE 175N/MM (1000LBF/TN) MIN STIFFNESS SPACECRAFT PURGE INTERFACE 85 NB.25 TO SEPARATION PLANE SEPARATION PLANE
PAYLOAD ADAPTER Y+ AXIS
SECTION F-F
6 POSSIBLE PURGE POSITIONS INTERCHANGEABLE WITH ELECTRICAL CONNECTIONS
PAYLOAD ADAPTER X+ AXIS
PURGE POSITION
SPACECRAFT INTERFACE
22.2MM GASSET CONTACT AREA 6.35 INLET
LAUNCH VEHICLE INTERFACE
DETAIL G ALL LOCATIONS
ALL DIMENSIONS IN MILLIMETERS
Figure B-9: 1666-mm Clampband Purge Interface (Nonstandard Service)
© Space Exploration Technologies Corp. All rights reserved.
FALCON USER'S GUIDE
APPENDIX C: CONSTELLATION PAYLOAD MECHANICAL INTERFACES AND KEEP-IN VOLUMES
15IN DIAMETER MECHANICAL INTERFACE
PL Z+ PL Y+
Figure C-t: 15" Diameter Mechanical Interface for Constellation Payloads
© Space Exploration Technologies Corp. All rights reserved.
100
FALCON USER'S GUIDE
24IN DIAMETER MECHANICAL INTERFACE
PL Z+ PL Y+
D D
30X O 279 2.801 2.801
30X O 279 2.801 2.801
SECTION D-D INCHES [MILLIMETERS]
Figure C-2: 24" Diameter Mechanical Interface for Constellation Payloads
© Space Exploration Technologies Corp. All rights reserved.
101
CUBE ARRANGEMENT KEEP-IN VOLUME
NOTES:
- ONE PAYLOAD PER VOLUME (4 VOLUMES TOTAL PER TIER)
- PAYLOAD ADAPTER MUST ALSO FIT INSIDE THE VOLUME
Figure C-3: Cube Arrangement Keep-In Volume for Constellation Payloads (no Acoustic Blankets)
© Space Exploration Technologies Corp. All rights reserved.
FALCON USER'S GUIDE
CUBE ARRANGEMENT KEEP-IN VOLUME
D 21.00 [333.40]
34.82 [884.42]
[58.50] [1485.90]
LAUNCH VEHICLE INTERFACE
C PL Y+ 49.69 [262.03]
PL X+ 90.0°
119.33 [830.86]
B 7.00 [177.00]
R 87.00 [2209.80]
A 46.00 [1168.40]
PL Z+ PL X+ NOTES:
- ONE PAYLOAD PER VOLUME (4 VOLUMES TOTAL PER TIER)
- PAYLOAD ADAPTER MUST ALSO FIT INSIDE THE VOLUME
INCHES [MILLIMETERS]
Figure C-4: Cube Arrangement Keep-In Volume for Constellation Payloads with Intrusion (no Acoustic Blankets)
© Space Exploration Technologies Corp. All rights reserved.
FALCON USER'S GUIDE
8 7 6 5 4 3 2 1
OCTAGON ARRANGEMENT KEEP-IN VOLUME (2 VOLUMES SHOWN)
PL Y+ PL Z+ PL Z+ 2X 45.000 [876.44]
2X 34.500 [876.44]
2X 45.000 PL X+ PL Y+ 2X 31.003 [556.35]
R 87.000 [209.80]
2X 60.453 [1539.54]
LAUNCH VEHICLE INTERFACE
B
A
NOTES:
- ONE PAYLOAD PER VOLUME (8 VOLUMES TOTAL PER TIER)
- PAYLOAD ADAPTER MUST ALSO FIT INSIDE THE VOLUME
INCHES [MILLEMETERS]
8 7 6 5 4 3 2 1
Figure C-5: Octagon Arrangement Keep-In Volume for Constellation Payloads (no Acoustic Blankets)
© Space Exploration Technologies Corp. All rights reserved.
FALCON USER'S GUIDE
APPENDIX D: CRYOGENIC PROPELLANT INTERFACE
CRYO-PROPELLANT INTERFACE 1575 CLAMPBAND
NOTE:
- CUSTOMER SHALL SIZE THE FLEX HOSE TO REACH THE DEFINED POSITION OF THE LAUNCH VEHICLE MALE CRYO FITTING.
- CONTACT SPACEX FOR FULL INTERFACE DEFINITION.
- CONTACT SPACEX TO REVIEW CUSTOMER MATING INTERFACE DRAWING.
CUSTOMER AS4325-12 (CONICAL FITTING)
TO CUSTOMER FLEX HOSE
CUSTOMER AS4325-12 I2 NOT ON CONICAL FITTING I2 MALE WITH LAUNCH VEHICLE AS4325-12 F12 (FEMALE FITTING)
LAUNCH VEHICLE Y+ AXIS
LAUNCH VEHICLE SIDE 130X8.070 THUHL
LAUNCH VEHICLE Y+ AXIS
22.866-8.898 INTERVAL PLAN TO TOP SIDE OF LAUNCH VEHICLE AS4325-12 F12 FITTING NOT FEATURE
LAUNCH VEHICLE AS4325-12 (FEMALE FITTING)
SECTION A-A 4X LOCATIONS
PAYLOAD TO LAUNCH VEHICLE INTERFACE PLANE (CLAMPBAND PASSIVE RING INTERFACE)
ALL DIMENSIONS IN MILLIMETERS
Figure D-1: Cryo-Propellant Mechanical Interface (1,575 mm Clampband)
© Space Exploration Technologies Corp. All rights reserved.
APPENDIX E: PAYLOAD CAD MODEL REQUIREMENTS Customer must provide SpaceX a CAD model of the payload in NX Parasolid (preferred) or STEP 214 or lower file format. SpaceX will integrate the payload CAD model with the models of the launch vehicle second stage. SpaceX-provided mechanical interface, and firing for visualization, integration, clearance check, and operations development purposes.
The payload CAD model must be simplified by the customer and focus primarily on outer mold line and interface fidelity (to facilitate efficient model manipulation and processing). Customer must limit their CAD model complexity, as requested by SpaceX, to only the details and interfaces necessary for integration with the launch vehicle, while retaining the basic structure of the payload. Spurious information must be removed from the model by customer before transmission to SpaceX (an example of unnecessary detail is thousands of bodies within a CAD model representing individual cells on a solar array).
Mass properties are provided in concert with CAD. This mass data must match exactly with the delivered CAD coordinate system configuration and units. The payload coordinate system should preferably follow the coordinate system described in Section 4.1.2.
The payload CAD model must include the following information in order for SpaceX to analyze clearances, prepare compatibility drawings, and produce payload ID images:
• Payload interface to launch vehicle. This includes: o Payload mechanical interface to launch vehicle o Electrical connectors and associated brackets, as defined in AV2052 (Electrical ICD) o Pusher pads • Components subject to review for clearance analysis. This includes: o External components to review for clearance to fairing volume (e.g. solar array panels, aft and forward antenna components, reflectors) o Any components in the immediate vicinity (<20 cm) of the interface components above o Any components which protrude below the separation plane • Any points which may require access after encapsulation • Simple payload bus structure.
The payload CAD model must NOT include:
• Internal payload or bus components • Spurious details, including individual solar array cells, fasteners, antenna, reflectors, etc., that do not add to the understanding of external volumes.
Prior to delivering CAD to SpaceX, please verify:
• All SpaceX hardware has been removed • Entire payload is fully contained within the desired flight configuration keep-in volume • Unnecessary detail that does not add to the understanding of external volumes has been removed • Simplified bodies fully envelope 0ML of actual payload • All direct LV interface bodies are included • Payload is properly configured – origin is at SpaceX standard interface, clocked correctly, preferably using the SpaceX payload coordinate system (Section 4.1.2), and agrees with the corresponding mass properties • File size is 100 MB or less • The file type is Parasolid (x_t), preferred by SpaceX. Alternatively, the file format is STEP 214 or lower file format
© Space Exploration Technologies Corp. All rights reserved. 106
APPENDIX F: PAYLOAD DYNAMIC MODEL REQUIREMENTS The payload dynamic model shall be provided to SpaceX as a Craig-Bampton reduced model. SpaceX provides a dynamic model summary template for customers to ensure the following requirements are met.
Payload Craig-Bampton Model Definition
Model Requirements • The model file should be no larger than 500 MB • The units of the model shall be clearly defined (English or SI) • The model will be delivered as a multipoint interface model (see Interface Requirements section) • The model shall be Craig-Bampton formatted • Modal damping shall be specified (see Damping Definition section) • Any uncertainty factor applied to the modal responses shall be defined (see Uncertainty Factor section) • The model shall have frequency content up to 150 Hz • All output requests shall be clearly defined (see Analysis Outputs section) • The model shall be an accurate, in good faith, representation of the payload including primary and secondary structures • Slosh effects shall be included, slosh modes identified, and method of scaling for acceleration shall be clearly defined
Interface Requirements • The interface to the launch vehicle shall remain physical with six degrees of freedom at each interface node • The location of the interface shall match the payload to launch vehicle mechanical interface definition (e.g., if customer is providing the separation system, it must be included in the model) • Boundary node locations shall be clearly defined in accordance with the following table for all payload interfaces matching the provided diameters. This ensures correspondence with payload adapter models
Boundary Grid Numbering Interface Diameter (mm) Number of Boundary Grids 937 120 1194 240 1575 120 1666 360 2624 244 2795 180 3117 180
• Interface points not defined at the payload to launch vehicle interface plane will not be allowed ○ Exception: The customer can prove their necessity and the interface point is sufficiently stiff, e.g. no electrical connections or ducting • The coordinate system used for the boundary degrees of freedom relative to the launch vehicle (payload clocking) shall be a cylindrical output coordinate system with the origin at the center of the interface. This coordinate system will be defined only once and in a clear manner. Boundary nodes will be numbered sequentially and ordered counterclockwise (i.e., about LV +X in a right-hand coordinate system). Example is shown in the figure below. • All grid points (in the DTM) for which fairing relative deflections are desired shall include all three translations sequentially, if an acceleration-based DTM is provided for launch vehicle to payload relative deflection calculations, then the displacement-based portion shall also be provided.
© Space Exploration Technologies Corp. All rights reserved. 107
SC Circular Interface
clocking θ per LV and SC requirements YLV ZLV 1st boundary node (BSET)
Boundary coordinate system definition example
Matrix Requirements
• The model shall include mass, stiffness, and Output Transformation Matrices • The mass and stiffness matrices (M and K, respectively) shall be provided as complete matrices • The M and K matrices shall be defined as shown below: o i are the modal degrees of freedom o b are the boundary degrees of freedom o w² is a diagonal matrix of the eigenvalues o Kbb is the stiffness from the boundary degrees of freedom
M = [Mbb MbI], K = [Kbb 0 w²]
• Output Transformation Matrices (OTM) a.k.a. data recovery matrices (DRM) used to recover payload responses (R), shall be in one of the three forms shown below, where x̂ are accelerations and x are displacements.
{R} = [DRM1] {x₀/x₁} {R} = [DRM2] {x₀/x₁} {R} = [DRM1] {x₀/x₁} + [DRM2] {x₀/x₁}
○ Responses may be recovered using a DRM1 (acceleration transformation matrix), a DRM2 (displacement transformation matrix), or using both a DRM1 and a DRM2. ○ DRM1 and DRM2 shall each be provided as separate matrices. ○ Load transformation matrices for element forces, pressures, stresses, etc. shall be recovered with either a DRM1, or using both a DRM1 and a DRM2.
• Total number of recoveries shall be limited to 5,000 rows. • Time histories are not a standard output and will not be provided unless determined necessary by SpaceX • Definition of the Craig-Bampton model rows and columns shall be provided to facilitate coupling of the payload to launch vehicle model. • Labels for the rows of the (DRM) shall be provided for inclusion in results tables. • All LTM matrices are defined such that they produce loads when multiplied by accelerations (not in Gs) and displacements: e.g. inch/sec2 and rad/sec2 and inch and radian or other consistent units.
© Space Exploration Technologies Corp. All rights reserved.
Analysis Outputs The following standard CLA outputs are delivered in Microsoft Excel and are reported by load case unless otherwise specified: • Payload Net-CG response max/min table • OTM response max/min tables* • Interface force max/min tables • Interface sine vibration curves with Q specified by customer • Relative displacements (between payload and faring)
- OTM = Output Transformation Matrix. May also be referred to as a DRM (data recovery matrix). OTMs can include DTM (displacement transformation matrix), ATM (acceleration transformation matrix), LTM (load transformation matrix) and others.
The output coordinate system of the interface force max/min tables and the interface sine vibration curves is dependent on the coordinate system in which the grid points are defined. The available coordinate systems are:
For a multi-point interface with a single coordinate system: • LV coordinate system • SC coordinate system (as defined by the coordinate system of the spacecraft interface DOF in the stiffness/mass matrices)
For a multi-point interface with multiple coordinate systems: • LV coordinate system • SV coordinate system (as defined by the coordinate system of the first boundary point in the stiffness/mass matrices)
If outputs in any other coordinate system are desired, then the customer shall generate and provide such outputs in the ATM and/or LTM response recovery matrices.
Damping Definition Diagonal modal damping shall be defined as a percent of critical (and may vary from mode to mode) unless there is firm rationale why full matrix damping should be exercised, such as the existence of an internal highly damped isolation system with known physical characteristics.
Expected slosh mode damping shall be included in the damping definition.
Uncertainty Factor SpaceX, as a standard practice, will apply a model uncertainty factor to all responses that reflects launch vehicle maturity. However, if customer desires the application of a larger model uncertainty factor, this shall be specifically requested. Under no circumstance will the model uncertainty factor be less than that used in SpaceX standard practice.
Documentation
SpaceX requests that the customer fill out the "spacecraft_customer_template" excel file when providing their dynamic model. This standardized template eases coupling of the spacecraft to the LV and ensures that required information is provided in a clear format.
SpaceX also requests that the payload dynamic model and populated customer template be accompanied by any customer generated supporting documentation (in the customer desired format) as needed. Provided documentation should include:
- Definition of units used (SI or English)
- Definition of the payload coordinate system relative to the launch vehicle
- Location of all interface grids in payload coordinate system
- Comparison of unreduced (FEM) and condensed (Craig-Bampton) models a. Mass b. Center of gravity relative to interface c. Strain energy d. First seven modes of free-free analysis e. Modal analysis, including modal effective mass
- A list of all frequencies
- Pictures and/or descriptions and frequencies of the first few mode shapes (including the three fundamental modes in X, Y, and Z)
- Definition of damping
- Definition of the model response (dynamic) uncertainty factor
- Definition of output format and requests, e.g., interface loads, interface accelerations, net CG loads, internal payload loads, shock response spectra (SRSs), etc. If SRSs are requested, the number of rows shall be limited to 500.
- If internal payload responses are requested, provide appropriate DRMs (ATMs, DTMs, and LTMs) as well as tables defining the rows of these matrices
- Definition of any payload limit loads, including primary structure and component level, in order for SpaceX to evaluate the CLA results (net CG, interface loads, and ATM/DTM/LTM) and determine if the CLA indicates an exceedance of payload structural capability
- Definition of slosh mode frequencies and mode numbers, along with expected damping and method for scaling relative to acceleration.
The above list is not all-inclusive, and customer is encouraged to provide additional information that will assist SpaceX in processing the payload dynamic model for the coupled loads analysis.
APPENDIX G: PAYLOAD THERMAL MODEL REQUIREMENTS
Model Definition and Thermal Analysis
SpaceX will perform an integrated launch thermal analysis demonstrating temperature response during encapsulated phases from hangar rollout to payload deploy. This analysis will couple the SpaceX payload compartment thermal model with the payload thermal model provided by customer and will analyze the combined models during a simulated launch.
Customer shall produce a coarsened thermal model of its payload(s), with a node(s) added for convection. The payload thermal model shall be in Thermal Desktop (dwg) file format whose units must be Joules, seconds, inches, lb, "C, and shall meet the model requirements described below. This model should contain less than 5,000 nodes total, including a maximum of four independent interfaces to the launch vehicle (note: SpaceX may accommodate additional nodes or interfaces upon request and mutual agreement). For nnumber of duplicate payloads in a single launch, each individual payload should be comprised of less than 5,000/nnodes. SpaceX will thermally connect surfaces in the Thermal Desktop 'tag set' "PL_CONVECT" with the expected air temperature during ground phases, thermally connect surfaces in the Thermal Desktop 'tag set' "PL_ATTACH" to the vehicle interface and run the integrated thermal models in a simulated mission.
Inputs required from and outputs delivered to the customer are listed below.
Inputs Required from Customer
- Completed customer Thermal Model Requirements Checklist outlined below
- Thermal Desktop payload thermal model with geometry (coarsened if necessary) in accordance to the customer Thermal Model Requirements Checklist
- Payload temperature requirements (by node) using the SpaceX template Excel file
- Instructions for payload thermal model integration and running
Output Delivered to Customer
- Microsoft PowerPoint slides summarizing analysis performed, including: a. Model validation b. Input summary (i.e. launch date/time, mission timeline, ECS set points) c. Free Molecular Heating (FMH) profile as well as trajectory visualization d. Nodal exceedances and transient plots of nodal exceedances
- Excel summary of min and max temperature predictions compared to customer-supplied limits
© Space Exploration Technologies Corp. All rights reserved.
Customer Thermal Model Requirements Checklist
• Each payload will be assigned a short, unique spacecraft name which will be used to differentiate that payload from others. The identifier will be inserted wherever [NAME] appears below. If there are expected to be more than one payload for a mission, the [NAME] shall correspond to a designated name of the individual payload, otherwise, the [NAME] shall correspond to the designated mission name of which the payload is part. For missions with identical/duplicate payloads in a single analysis, there shall at least exist one payload thermal model file per payload with unique filenames that properly identify each unique payload (e.g. [NAME_1], [NAME_2], [NAME_3]) o Thermal Desktop "External References" (a.k.a. "XREFs") are not permitted within the payload model(s). o Missions with identical/duplicate payloads shall also have unique: • Submodels names • Heater registers • Domain tag set names
• All sub-model names shall begin with PL_[NAME]_ o The total number of submodels across all payloads shall not exceed 800
• All optical and thermophysical properties shall begin with PL_[NAME]_ o Optical and thermal property files containing the respective properties shall be named PL_[NAME], roo and PL_[NAME], tdp, respectively o Optical and thermal property aliases shall have names that begin with PL_[NAME]_ o All Thermal Desktop stack names in the Material Stack Manager shall begin with PL_[NAME]_
• All Thermal Desktop Symbols shall begin with PL_[NAME]_ and be in a symbol group named "Payload" o The total number of symbols in the payload model shall not exceed 2,000
• All Thermal Desktop Layers shall begin with PL_[NAME]_
• All surfaces that should radiate to surroundings shall be in a Thermal Desktop Radiation Analysis Group named "Payload", and any other radiation analysis groups shall be named PL_INT_RAD1, PL_INT_RAD2 ... o The total number of radiation analysis groups across all payloads shall not exceed 15
• All surfaces that should be subject to convection with fairing air shall be in a Thermal Desktop tag set named "PL_CONVECT" of object type Face Set
• All surfaces that should be mechanically connected to the launch vehicle (e.g. payload adapter or separation ring) shall be in a Thermal Desktop tag set named "PL_ATTACH" of object type Face Set o For customer-owned separation systems, customer shall provide a conductance value between the payload adapter and payload o The total number of domain tag-sets across all payloads shall not exceed 1,000
• Customer may additionally provide one SINDA/FLUINT include file named "Payload_[NAME]inc" or one Thermal Desktop logic object that will be included in the integrated Thermal Desktop model. All manually coded thermal submodel logic must be contained within the include file or logic object. The file or logic object may not contain a HEADER OPERATIONS block, and it must be included in the test Case Set (see below) for validation. Units within this file or logic object must be Joules, seconds, inches, lb, "C" o "User Written Build Statements" or "User Defined" build statements within the SINDA tab of the Case Set(s) are not permitted
• Ensure payload propellant tank(s) and payload mass are accurately captured in the Thermal Desktop model
• The payload model shall contain Thermal Desktop symbols named: o PL_OnPad that will drive any changes to the payload model that depend on the positional status of the launch vehicle. During integrated analysis, PL_OnPad will be set to 1 prior to liftoff and to 0 after liftoff. This symbol is commonly used to enable (ground)/disable (ascent) convection. o PL_[NAME]HeatersOn that will drive any changes to the payload model that depend on whether the payload's heaters are operational. During integrated analysis, PL_[NAME]HeatersOn will be set to 1 when the payload heaters are in the ON state (i.e. enabled); it will be set to 0 when the payload heaters are in the OFF state (i.e. disabled). This symbol is commonly used to enable/disable heaters.
o PL_[NAME]AvPower that will drive any changes to the payload model that depend on whether the payload is in the powered ON or OFF state. During integrated analysis, PL_[NAME]AvPower will be set to 1 when the payload is in the powered ON state; it will be set to 0 when the payload is in the powered OFF state. This symbol is commonly used to enable/disable heat load dissipations.
• For clarity, customer shall provide a table of how these symbols, and others, if included in the model file(s), are to be handled by SpaceX in the analysis (note: separate hot and cold case values are permitted). Unless otherwise specified by customer, SpaceX will assume symbol values as displayed in the table below.
Sample Table of Symbol Value for Analyzed Phases Analysis Phase PL_OnPad PL_[NAME]HeatersOn PL[Name]_AvPower In Hangar (Steady) 1 0 0 Rollout (Transient) 1 0 0 On Pad (Trans...) 1 1 1 Liftoff to SES1 (...) 0 1 1 SE51 to Fairing Deploy (...) 0 1 1 Fairing Deploy to SECO1 (...) 0 1 1 SECO3 to Payload Deploy (...) 0 1 1
• Customer shall provide a MS Word document, MS PowerPoint presentation, or PDF containing a general summary of the payload thermal model. Within this document, there shall be a dedicated section clearly summarizing/outlining details for running and integrating the payload model, noting the following (if included/necessary): o Include file(s) o Logic object(s) o Node conductor blocks o Node correspondence o Optical/Themal property files (e.g. which is to be used: beginning of life or end of life) o Property aliases o Material stacks o Payload/Payload adapter conductance o Thermal Desktop symbols (see table above)
• The payload model shall include a test case in the Thermal Desktop Case Set Manager, including (at a minimum) a steady-state run followed by a 1-hour transient run. The test case shall demonstrate that the model's SINDA run time is less than 1 hour of clock time per hour of transient model time as measured by the ASTAP execution time output by SINDA in the case set's .out file (i.e. the model must run at faster than real time). The submitted model shall include the results of that test case in a SINDA .sav format file. SpaceX will run the prescribed case set in Thermal Desktop and confirm that it produces identical results prior to integration with the SpaceX launch vehicle thermal model (i.e. validation). All aspects of the payload model shall be exercised in the Thermal Desktop test case, or multiple test cases may be supplied if this cannot be accomplished in a single test case. Integrated analysis will only proceed once this requirement is met or mutually agreed upon. o Ensure test case node names and numbering are consistent with results of test case node names and numbering o Ensure the as built test case set in Thermal Desktop corresponds to the provided test case results
• Customer shall fill out a table of temperature requirements using a SpaceX template Excel file. Temperature requirements embedded inside the summary documentation (i.e. docx, pptx, or pdf) will need to be included in a separate xlsx file. This file must follow the exact same format as in the provided template. Customer-supplied temperature limits shall include all uncertainty and margin. Thus, model results will be compared directly to customer-supplied limits. o Prior to sending the table of temperature requirements to SpaceX, ensure temperature requirements are correct and up to date.
APPENDIX H: DELIVERY FORMAT OF SEPARATION STATE VECTOR SpaceX OPM output (generated YYYY-MM-DD-Day-HH-MM-SS):
All orbital elements are defined as osculating at the instant of the printed state.
Orbital elements are computed in an inertial frame realized by inertially freezing the WGS84 ECEF frame at time of current state. This OPM is provided based on flight telemetry from the second stage, and therefore represents the state of the second stage and not the state of any other body. Any position, velocity, attitude, or attitude-rate differences between the second stage and any other body need to be accounted for by the recipient of this OPM.
UTC time at liftoff: DOY.HH.MM.SS.SS UTC time of current state: DOY.HH.MM.SS.SS Mission elapsed time (s): +XX.XX ECEF (X.Y.Z) Position (m): +XXXXXXXX.XXX, +XXXXXXXX.XXX, +XXXXXXXX.XXX ECEF (X.Y.Z) Velocity* (m/s): +XXXX.XXX, +XXXX.XXX, +XXXX.XX LVLH to BODY quaternion (S.X.Y.Z): +X.XXXXXXXX, +X.XXXXXXXX, +X.XXXXXXXX Inertial body rates (X.Y.Z) (deg/s): +X.XXXXXXXX, +X.XXXXXXXX, +X.XXXXXXXX Apogee Altitude** (km): +XXXXXXXX.XX Perigee Altitude** (km): +XXXX.XX Inclination (deg): +XX.XX Argument of Perigee (deg): +XXXX.XX Longitude of the Ass. Node*** (deg): +XX.XX True Anomaly (deg): +XX.XX
Notes:
- ECEF velocity is Earth-relative ** Apogee/Perigee altitude assumes a spherical Earth, 6378.137 km radius *** LAN is defined as the angle between Greenwich Meridian (Earth longitude 0) and the ascending node
APPENDIX I: TEST SCHEDULE FOR CONSTELLATIONS Table I-1 shows the minimum required planned test schedule for a constellation consisting of 20 identical payloads following a protoqualification approach (total number of payloads and use of protoqualification shown as an example). The first five flight unit serial numbers, then flight units every fifth serial number are fully tested at integrated level. Constellations following a fleet qualification with a dedicated qualification unit (not flown) may use acceptance levels on the first flight unit instead.
Table I-1: Example Test Schedule for a Constellation of 20 Identical Payloads
SV SN# SN 1 SN 2 SN 3 SN 4 SN 5 SN 6 SN 7 SN 8 SN 9 SN 10 SN 11 SN 12 SN 13 SN 14 SN 15 SN 16 SN 17 SN 18 SN 19 SN 20
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The following table shows an example modified test schedule for the same constellation in Table I-1, where a Type 2 retest was triggered for SN12 (as an example), due to one of the factors listed in Section 7.3 for retest. SN12 and SN13 are fully tested at integrated level to re-establish test baseline, then the original lot test sampling approach is resumed.
Table I-2: Test Schedule for a Constellation of 20 Identical Payloads (with Retest Trigger Type 2 Example)
SV SN# SN 1 SN 2 SN 3 SN 4 SN 5 SN 6 SN 7 SN 8 SN 9 SN 10 SN 11 SN 12 SN 13 SN 14 SN 15 SN 16 SN 17 SN 18 SN 19 SN 20
Quasi static load R (PT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (AT) R (