Fundamental Technologies Galileo Spacecraft Pages

Galileo EPD Handbook

Revised 2003-05, T. Hunt-Ward and T. P. Armstrong

Table of Contents

• Purposes of This Document and Preface
• Photos of the Energetic Particles Detector
• List of Figures
• List of Tables
• Chapter 1. Instrument Summary
• Introduction
• Overview and System Summary
• Mechanical System Overview - Post-Challenger
• Mechanical System Overview - Pre-Challenger
• CMS Subsystem
  • Revisions Post-Challenger
  • Pre-Challenger CMS Overview
  • Analog Electronics
  • Calibrations
• LEMMS Subsystem Overview
  • Mechanical - Geometrical Factors
    • Numerical Calculation of Three-Dimensional Electron and Proton Trajectories in the Galileo EPD LEMMS Sensor Assembly, a technical report by Y. Wu, C. McKee, and T. P. Armstrong, Dec. 1986.
    • Charged Particle Response of Magnetic Deflection System for Galileo Jupiter Orbiter, Y. Wu and T. P. Armstrong; draft of a paper later published in Nuclear Instruments and Methods in Physics Research, A265, 561, 1988.
    • EPD Geometry Factors, R. W. McEntire, EPD Science Team Meeting, March 1998.
    • Geometric Factor Calculation for the EPD LEMMS Telescope, A. Lagg, EPD Team Meeting, March 1998.
  • Electronics
  • Calibrations
  • LEMMS Passbands
• Data System
  • Summary of Data System Information from 1992 Space Science Reviews Article
  • Galileo EPD Telemetry Format
    • R. C. Moore memo dated Aug. 3, 1978
    • R. W. McEntire memo dated Dec. 26, 1978
  • EPD Telemetry Packet Formats
    • R. C. Moore memo dated Aug. 9, 1979
    • R. C. Moore memo dated Aug. 13, 1979
  • Galileo EPD Log-Compression Algorithm
  • Galileo EPD LEMMS PHA Spectrum Log-Compression Algorithm
  • JPL Galileo Orbiter Flight Software Requirements for EPD
  • EPD Housekeeping Functions
    • R. C. Moore memo of January 24, 1979
    • R. C. Moore memo of August 26, 1979
  • EPD Command Density at Satellite Encounter
  • Servicing the Galileo EPD Rate Channel Accumulators
  • EPD Bus Commands
  • Instrument Software Management Plan
• Stepping Motor Subsystem
• EPD Commands
• Chapter 2. EPD Software
  • EPD Flight Software System Documentation
    • 1.0 Introduction
    • 2.0 Software System Overview
    • 3.0 Microprocessor System Overview
    • 4.0 Telemetry Formatting
    • 5.0 Rate Channel Processing
    • 6.0 Pulse Height Analyzer
    • 7.0 Housekeeping Data Processing
    • 8.0 Alarm Status Monitoring
    • 9.0 Synchronization
    • 10.0 Command Processing
    • 11.0 Scanning Motor System
    • 12.0 Autocalibrator
    • 13.0 EPD Memory Loads
  • EPDProc
    • Introduction
    • Section 1. EPD Processor Concepts and Terminology
    • Section 2. EPD Processor Inputs
    • Section 3. EPD Processor Outputs
    • Section 4. EPD Processor
  • Rational for New Format
  • New EPD Format and Implementation
  • EPD SBand Mission Software Requirements
    • Introduction
    • Software Versions
    • Science Background
    • EPD Telemetry Output Rates
    • EPD Rate Channel Data Processing
    • Telemetry Output Buffers in the EPD Memory
    • CDS Rate Channel to Bin Algorithm
    • Rate Channel Array Compression
    • CMS Pulse Height Analysis (PHA) Data
    • CDS-EPD Interface Description
    • CDS-Produced EPD Telemetry Record
    • New EPD Software Tasks
    • Telemetry Mode Change
    • Motor Control Functions
    • New EPD Command Functions
    • Transition Mode Commands
    • EPD Memory Storage Availability
    • EPD Memory Map
    • Appendix A: Buffer Storage for the EPD Rate Channel Bins
    • Appendix B: EPD Accumulator Hardware Addresses
    • Appendix C: EPD Software Patch Hook Values
    • Appendix D: EPD Telemetry Mode Definition Blocks
  • LGA Processor Status Memo
  • LGA Processing Software for the EPD
    • 1. Introduction
    • 2. LGA Processor Inputs
    • 3. LGA Processor Outputs
    • 4. LGA Processor Overview
    • 5. LGAGEN Overview
    • 6. LGA2ASCII Overview
    • Appendix A. Revisions
    • Appendix B. Coordinate Systems
    • Appendix C. Source Code
    • Appendix D. References
• Appendices
• Appendix A. EDR File Structure
  • EPD Housekeeping Decom
  • Spacecraft Clock
  • EPD Subsystem Telemetry
  • EPD Telemetry Packet Definitions
• Appendix B. SEDR Files
  • 1. General Description
  • 2. Interface Characteristics
  • 3. Access
  • 4. Detailed Interface Specifications
  • Appendix: Glossary
• Appendix C. Magnetometer Subsystem
• Appendix D. AACS Position and Rate Data
• Appendix E. EPD File Structure
  • Description of EPD File Header Record
  • Record Header
  • Rate Block
  • CMS PHA Block
  • LEMMS PHA Block
  • Rate Calc Block
  • Binned Rate Averages

Return to Fundamental Technologies Main Galileo Page.
Return to Fundamental Technologies Home Page.

If you find any errors, please send email to Tizby Hunt-Ward: tizby@ftecs.com. Suggestions and comments are welcome.

Updated 9/11/09, T. Hunt-Ward
tizby@ftecs.com