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Hosted Payload Interface Guide for Proposers

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Hosted Payload Interface Guide for Proposers Common Instrument Interface Project Hosted Payload Interface Guide for Proposers Mar. 22, 2018 Hosted Payload Interface Document Version: Initial Document No: HPIG0001 Effective 3/22/2018 Page 1 of 119 Submitted By: Nikzad Toomarian (signed) ___________________________ Nikzad Toomarian JPL/CII Project Lowell E. Primm (signed) ___________________________ Lowell E. Primm GSFC/CII Project Manager C. Randy Regan (signed) ___________________________ C. Randy Regan NASA ESSP PO Chief Engineer Approved By: ___________________________ ___________________________ Gregory Stover (signed) 22 Mar., 2018 ___________________________ ___________________________ Gregory Stover Date NASA ESSP PO Program Director Hosted Payload Interface Document Version: Initial Document No: HPIG0001 Effective 3/22/2018 Page 2 of 119 Change Log Section Version Date Affected Description Hosted Payload Interface Document Version: Initial Document No: HPIG0001 Effective 3/22/2018 Page 3 of 119 Special Acknowledgement The development of the Hosted Payloads Interface Guide (HPIG) is the direct result of a collaborative effort between the NASA Common Instrument Interface (CII) Project, the Earth System Science Pathfinder Program Office, the USAF Space and Missile Center’s Hosted Payload Office, and The Aerospace Corporation. The HPIG provides a prospective Instrument Developer with technical recommendations to assist them in designing an Instrument or Payload that may be flown as a hosted payload on commercial satellites flown in Low Earth Orbit (LEO), or Geostationary Earth Orbit (GEO). The document is now in its second iteration, with several updates and improvements. We wish to express a special thanks to our teammates within the USAF Space and Missile Center’s Hosted Payload Office, and The Aerospace Corporation. Their contributions have been remarkable, timely, and accurate. In addition, the members of the USAF Space and Missile Center’s Hosted Payload Office, and The Aerospace Corporation have gone above and beyond their tasks as defined by the Memorandum of Understanding. They have provided not only impeccable technical inputs to the development of the Hosted Payload Interface Guidelines, but have assisted in the establishment and conduct of workshops, and other special meetings and events. Without the contributions of the USAF and the Aerospace Corporation, the development of this document would not have been possible!! Hosted Payload Interface Document Version: Initial Document No: HPIG0001 Effective 3/22/2018 Page 4 of 119 Table of Contents EXECUTIVE SUMMARY ............................................................................................... 11 1 OVERVIEW ..................................................................................................... 12 1.1 Introduction -------------------------------------------------------------------------------------- 12 1.2 What is a Hosted Payload and Other Definitions? ----------------------------------------- 12 1.3 How the Document Was Developed --------------------------------------------------------- 13 1.4 How to Use this Document -------------------------------------------------------------------- 13 1.5 Scope --------------------------------------------------------------------------------------------- 14 1.6 Document Heritage ----------------------------------------------------------------------------- 16 1.7 Interaction with Other Agencies Involved with Hosted Payloads ----------------------- 16 2 Hosted Payload Imperative – Do No Harm ...................................................... 18 3 DESIGN GUIDELINES FOR LEO ................................................................. 20 3.1 Assumptions ------------------------------------------------------------------------------------- 20 3.2 Mission Risk ------------------------------------------------------------------------------------- 20 3.3 Instrument End of Life ------------------------------------------------------------------------- 20 3.4 Prevention of Failure Back-Propagation ---------------------------------------------------- 20 3.5 Data Guidelines --------------------------------------------------------------------------------- 21 3.5.1 Assumptions .................................................................................................................21 3.5.2 Data Interface ...............................................................................................................21 3.5.3 Data Accommodation ..................................................................................................21 3.5.4 Command Dictionary ...................................................................................................21 3.5.5 Telemetry Dictionary ...................................................................................................21 3.5.6 Safe mode.....................................................................................................................22 3.5.7 Command (SAFE mode)..............................................................................................22 3.5.8 Command (Data Flow Control) ...................................................................................22 3.5.9 Command (Acknowledgement) ...................................................................................22 3.5.10 Onboard Science Data Storage ....................................................................................22 3.6 Electrical Power System Guidelines --------------------------------------------------------- 22 3.6.1 Assumptions .................................................................................................................22 3.6.2 Grounding ....................................................................................................................25 3.6.2.1 Grounding Documentation...........................................................................................25 3.6.3 Power Return ...............................................................................................................25 3.6.4 Power Supply Voltage .................................................................................................25 3.6.5 Power Bus Interface .....................................................................................................25 3.6.6 Survival Heater Bus Interface ......................................................................................25 3.6.7 Bonding ........................................................................................................................26 3.6.8 Mitigation of In-Space Charging Effects .....................................................................26 3.6.9 EPS Accommodation ...................................................................................................26 3.6.9.1 Instrument Power Harness ...........................................................................................26 3.6.9.2 Allocation of Instrument Power ...................................................................................26 3.6.9.3 Unannounced Removal of Power ................................................................................27 Hosted Payload Interface Document Version: Initial Document No: HPIG0001 Effective 3/22/2018 Page 5 of 119 3.6.9.4 Reversal of Power ........................................................................................................27 3.6.9.5 Power-Up and Power-Down ........................................................................................27 3.6.9.6 Abnormal Operation Steady-State Voltage Limits ......................................................27 3.7 Mechanical Guidelines ------------------------------------------------------------------------- 27 3.7.1 Assumptions .................................................................................................................27 3.7.2 Mechanical Interface ....................................................................................................28 3.7.3 Mechanical Accommodation .......................................................................................28 3.7.3.1 Mass .............................................................................................................................28 3.7.3.2 Volume .........................................................................................................................28 3.7.4 Functionality in 1 g Environment ................................................................................28 3.7.5 Stationary Instrument Mechanisms..............................................................................29 3.7.6 Moveable Masses .........................................................................................................29 3.7.7 Minimum Fixed-Base Frequency ................................................................................29 3.8 Thermal Guidelines ----------------------------------------------------------------------------- 29 3.8.1 Assumptions .................................................................................................................29 3.8.2 Thermal Interface .........................................................................................................30 3.8.3 Thermal Design at the Mechanical Interface ...............................................................30 3.8.4 Conductive Heat Transfer ............................................................................................30 3.8.5 Radiative Heat
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