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Communication Systems

Communication Systems. Jason A. Soloff NASA/GSFC Code 567 August 16-17, 2005. Level 2 431-SPEC-000008 LRO Electrical Systems Specification 431-OPS-000042 LRO Mission Concept of Operations 431-REQT-000004 LRO Mission Requirements Document

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Communication Systems

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  1. Communication Systems Jason A. Soloff NASA/GSFC Code 567 August 16-17, 2005

  2. Level 2 431-SPEC-000008 LRO Electrical Systems Specification 431-OPS-000042 LRO Mission Concept of Operations 431-REQT-000004 LRO Mission Requirements Document 431-SPEC-000091 General Thermal Systems Specification Level 3 431-REQT-000137 Communication System Requirements for the Lunar Reconnaissance Orbiter 451-RFICD-LRO/LN Radio Frequency Interface Control Document (RFICD) Between the Lunar Reconnaissance Orbiter (LRO) and the Lunar Network (LN) Derived (Level 4) 431-SPEC-000121 Performance Specification for the LRO S-Band Transceiver Subsystem 431-SPEC-000138 Performance Specification for the LRO Ka-Band Modulator 431-SPEC-000178 Performance Specification for the LRO Ka-Band Traveling Wave Tube Amplifier 431-SPEC-000179 Performance Specification for the LRO High Gain Antenna System 431-SPEC-TBD Performance Specification for the LRO Ka-Band Isolator 431-SPEC-TBD Performance Specification for the LRO Omnidirectional Antennas 431-SPEC-TBD Performance Specification for the LRO S-Band Hybrid 431-SPEC-TBD Performance Specification for the LRO S-Band Isolator Derived (ICD) 431-ICD-TBD LRO High Gain Antenna ICD 431-ICD-TBD LRO Omnidirectional Antenna Mechanical ICD 431-ICD-TBD LRO S-Band Subsystem ICD 431-ICD-TBD LRO Ka-Band Subsystem ICD Derived (I&T Procedures & Plans) 431-PLAN-TBD LRO S-Band Subsystem Integration & Test Procedure 431-PLAN-TBD LRO Ka-Band Subsystem Integration & Test Procedure Lunar Reconnaissance Orbiter (LRO)Communication System Document List

  3. Lunar Reconnaissance Orbiter (LRO)Communication SystemLevel 2 Flow Down KeyRequirements

  4. Lunar Reconnaissance Orbiter (LRO)Communication SystemLevel 2 Flow Down KeyRequirements

  5. Lunar Reconnaissance Orbiter (LRO)Communication SystemLevel 2 Flow Down KeyRequirements

  6. Lunar Reconnaissance Orbiter (LRO)Communication SystemLevel 2 Flow Down KeyRequirements

  7. Lunar Reconnaissance Orbiter (LRO)Communication SystemLevel 2 Flow Down KeyRequirements

  8. Lunar Reconnaissance Orbiter (LRO)Communication SystemBlock DiagramS-Band TT&C Subsystem

  9. Lunar Reconnaissance Orbiter (LRO)Communication SystemBlock DiagramKa-Band High Rate Downlink Subsystem

  10. Preliminary Verification Approach Communication System Analysis S-Band frequency spectrum interference analysis S-Band link budget calculation Ka-Band link budget calculation HGA RF field calculation and modeling Omnidirectional antenna RF phasing analysis Navigation signal accuracy analysis Mini-RF interference analysis Flight Module Testing Performed at vendor and as part of LRO I&T Comm System Verifications RF compatibility test (RF Compat Lab, TURFTS) Antenna radiation pattern measurement (GEMAC) End-to-end communication link BER measurement EMI/EMC compliance testing with Mini-RF Lunar Reconnaissance OrbiterCommunication System

  11. LRO Communication driving requirements are defined COMM preliminary architecture developed in accordance with defined driving requirements COMM system functional allocation of requirements completed COMM system component specifications in development Interfaces being defined between the following elements at Level 3 S-Band / C&DH interface Ka-Band / C&DH interface HGA / Mechanisms interface Driving requirements still in development Information assurance based on no encryption requirement Lunar Reconnaissance OrbiterCommunication System Summary The Comm Subsystem is ready for Preliminary Design

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