The Galileo Energetic Particles Detector
Galileo EPD Handbook
Chapter 2. EPD Software
Energetic Particle Detector Experiment Flight Software System Documentation (continued)
Source: H. Malcom, July 30, 1982
Scanning System Telemetry:
Closed-Loop Mode (Open Loop = 0) |
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Telemetry (TM) Byte | Bit 7 | Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0 |
Byte 1 | Scan Error* | Aborted Fast Scan* | Emergency Count* | *Direction | *Centerline |
* * * |
||
Byte 2 | Emergency | Open Loop = 0 | Modified Scan | Fast Scan | Go to Sec-tor "XYZ" | X | Y | Z |
Byte 3 | Alternate Step Rate |
CCW End-Sector Code |
Chicken Mode |
CW End-Sector Code |
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Byte 4 |
Number of Invalid Motor Commands |
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Byte 5 | Spare | Spare |
Step Count |
Cease Scan* | ||||
Open-Loop Mode (Open Loop = 1) |
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Byte 1 | Scan Error* | Aborted Fast Scan* | Emergency Count* | *Direction | *Centerline |
* * * |
||
Byte 2 | Emergency | Open Loop = 1 | Limited Scan | Fast Scan | Respond to "XYZ" Triggers | X | Y | Z |
Byte 3 | Alternate Step Rate |
Not Used |
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Byte 4 |
Number of Invalid Motor Commands |
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Byte 5 | Spare | Spare |
Step Count |
Cease Scan* |
*These bits are assumed to be sampled every 4/3 second. All other bits may be sampled once a minute.
Return to EPD Flight Software System Documentation table of contents page.
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Galileo Table of Contents Page.
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Technologies Home Page.
Updated 8/23/19, Cameron Crane
QUICK FACTS
Mission Duration: Galileo was planned to have a mission duration of around 8 years, but was kept in operation for 13 years, 11 months, and 3 days, until it was destroyed in a controlled impact with Jupiter on September 21, 2003.
Destination: Galileo's destination was Jupiter and its moons, which it orbitted for 7 years, 9 months, and 13 days.