Fundamental Technologies Galileo Spacecraft Pages

Appendix A. EDR File Structure (continued)

3. EPD Subsystem Telemetry

Source: GLL-3-280, Rev. B, Appendix A, March 15, 1985

This section describes the format and content of the EPD output.

Table of Contents:

• EPD Packet (below; please scroll down)
• Instrument Synchronicity (below; please scroll down)
• Analog Housekeeping
• Digital Status
• CMS PHA/LEMMS PHA Data
• LEMMS PHA Data
• Rate Channel Data

EPD Packet

The schematic of this packet is shown in Figure 1. One EPD packet is inserted in each LRS frame.

Figure 1. EPD Packet

Instrument Synchronicity

Within the EPD packet there will exist one major synchronism relative to the SCLK. The EPD synchronization index is equal to the SCLK Mod 91 count.

Next: Analog Housekeeping

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Updated 9/5/04, T. Hunt-Ward
tizby@ftecs.com