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C&DH

C&DH. Philip Luers NASA/GSFC Code 561 August 16-17, 2005. LRO Mission Assurance Requirements RLEP MAR 430-RQMT-000006. MAR. Requirements Flow-Document Tree. CRaTER EICD 431-ICD-000094. LRO Requirements Document 431-RQMT-00011. LRO ELV Mission Specification RLEP-LRO-P40. MRD.

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C&DH

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  1. C&DH Philip Luers NASA/GSFC Code 561 August 16-17, 2005

  2. LRO Mission Assurance Requirements RLEP MAR 430-RQMT-000006 MAR Requirements Flow-Document Tree CRaTER EICD 431-ICD-000094 LRO Requirements Document 431-RQMT-00011 LRO ELV Mission Specification RLEP-LRO-P40 MRD Diviner EICD 431-ICD-000095 LRO Mechanical Environments and Verification Requirements 431-RQMT-000012 LRO ELECTRICAL SPEC 431-SPEC-00008 LAMP EICD 431-ICD-000096 LAMP DICD 431-ICD-000106 LRO Radiation Requirements 431-RQMT-000045 LRO PSE ICD 431-ICD-000018 LEND EICD 4301-ICD-000097 THERMAL SYSTEM SPEC 431-SPEC-000091 LOLA EICD 431-ICD-000098 COMMUNICATION SYSTEM REQUIREMENTS 431-REQT-000137 C&DH Requirements 431-RQMT-000168 LROC EICD 431-ICD-000099 LROC DICD 431-ICD-000109 SpaceWire SPEC 431-SPEC-000103 LRO Flight Software Requirements 431-REQT-000139 1553B Bus Spec 431-SPEC-000102 CDH FSW LVPC REQs Section 6 Chassis REQs Section 14 SBC REQs Section 7 HK/IO REQs Section 8 Thermal REQs Section 9 SSR REQs Section 10 KaComm REQs Section 11 S-Band REQs Section 12 Backplane REQs Section 13

  3. Lunar Reconnaissance Orbiter (LRO)C&DH SystemLevel 2 Flow Down KeyRequirements to all C&DH Sub-Assemblies

  4. Lunar Reconnaissance Orbiter (LRO)C&DH SystemLevel 2 Flow Down KeyRequirements to Single Board Computer (SBC)

  5. Lunar Reconnaissance Orbiter (LRO)C&DH SystemLevel 2 Flow Down KeyRequirements for Data Volume

  6. Lunar Reconnaissance Orbiter (LRO)C&DH SystemLevel 2 Flow Down KeyRequirements for Networks

  7. Lunar Reconnaissance Orbiter (LRO)C&DH SystemLevel 2 Flow Down KeyRequirements for Telemetry

  8. Lunar Reconnaissance Orbiter (LRO)C&DH SystemLevel 2 Flow Down KeyRequirements for Commands

  9. Lunar Reconnaissance Orbiter (LRO)C&DH SystemLevel 2 Flow Down KeyRequirements for Timing

  10. Lunar Reconnaissance Orbiter (LRO)C&DH SystemLevel 2 Flow Down KeyRequirements for Timing

  11. Lunar Reconnaissance Orbiter (LRO)C&DH SystemLevel 2 Flow Down KeyRequirements for Instrument Interfaces

  12. LRO C&DH Architecture Block Diagram NAC1 NAC2 WAC Mini- RF L A M P LEND D ivi ner C R A T E R L O L A SUBSYSTEMS (ACS, PSE, PRO/DEP) Hi-Rate Tlm 125Mbps (Max.) S-Xpndr LROC HGA Ka-Xmtr SpaceWire FPGA SpaceWire FPGA 32Mbps HGA Gimbals 8 to 32Mbps (Max.) 38.4Kbps (UART) Serial IF 1553B Low-Rate Tlm 2Mbps Max & Command 4Kbps 1Mbps 5 Heater out Unsw.+28V 2.186 Mbps Max. (HK Downlink) Sw. +28V (Heater) Sw. +28V (Ka-Comm) 2.186 Mbps Max. (LAMP Tlm) Sw. +28V (SSR) I/O 125 Mbps (Science Downlink) UnSw. +28V (S-Comm) 50 Mbps Max. (Tlm) Unsw. +28V 1PPS LVPC Thermal Card 1553 Summit 1553 Summit BAE SpaceWire ASIC SSR BAE SpaceWire ASIC SpaceWire FPGA HK/IO Ka- Comm SpaceWire FPGA S- Comm SpaceWire FPGA RAD750 SBC ( A) (B) +28V Power +/-15V,+5V, +3.3V (A) SpaceWire (HSB) +3.3V (B) Backplane (Power & POR) 1553B (LSB) C&DH

  13. Analysis ▪ FPGA/ASIC (Worst-case Timing Simulation, Test Benches) ▪ Board-level (Test Benches, Throughput Performance, Signal Integrity) Testing ▪ Component Radiation (+1.5V Linear Regulator, ACTEL FPGA AX series, Micron SDRAM dies) ▪ Subsystem Board-level (BB, ETU & FLT) Box-level (ETU & FLT) ▪ Environments EMI/EMC, Thermal Vacuum, Vibration (FLT) ▪ System I&T FLATSAT: Subsystems Electrical Interface Testing (ETU) Spacecraft (FLT) Orbiter: EMI/EMC, Thermal Vacuum, Vibration, Acoustic (FLT) Lunar Reconnaissance Orbiter (LRO)C&DH SystemLevel 2 Verification

  14. C&DH Level 2 Requirements are defined, and are traceable to LRO requirements. ▪ C&DH architecture meets these requirements. All C&DH requirements have been captured in a requirements document. ▪ Requirements and technical resources have been allocated to assemblies. C&DH Requirements are in the process of submission to CM for release. Key Interface Requirements are defined. ▪ Have initiated ICD-Level interface definition, some TBD’s pending. Key Trade Studies and Analyses have been completed (Data Volume, 1553B, SpaceWire) Lunar Reconnaissance Orbiter (LRO)C&DH SystemLevel 2 Summary C&DH is ready to continue Preliminary Design.

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