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SSI Raw Experiment Data Record (REDR) for Phase 2 - USGS PDS ...

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Solid State Imaging <strong>Raw</strong> <strong>Experiment</strong> <strong>Data</strong> <strong>Record</strong> Software Interface Specification<br />

4-8<br />

Table 4-1. Telemetry Header - Continued<br />

Byte Bit Item Description<br />

444 - 447<br />

448<br />

449<br />

450<br />

451 - 454<br />

455<br />

456<br />

457<br />

458-465<br />

466-473<br />

474-481<br />

482-489<br />

490<br />

491<br />

492<br />

493 0-4<br />

5-6<br />

7<br />

Starting SCLK<br />

RIM<br />

MOD91<br />

MOD10<br />

MOD8<br />

Ending SCLK<br />

RIM<br />

MOD91<br />

MOD10<br />

MOD8<br />

<strong>SSI</strong>3_PKT when<br />

available.<br />

Plat<strong>for</strong>m RA<br />

Plat<strong>for</strong>m DEC<br />

Plat<strong>for</strong>m TWIST<br />

Plat<strong>for</strong>m CLOCK<br />

angle<br />

Standard<br />

Housekeeping<br />

<strong>Data</strong> Words 14, 19,<br />

and 22 <strong>for</strong> this<br />

image when<br />

available.<br />

Standard<br />

Housekeeping<br />

<strong>Data</strong> Word 23 <strong>for</strong><br />

this image when<br />

available.<br />

Spacecraft Clock of the<br />

start of image. This clock<br />

refers to the start of the<br />

<strong>SSI</strong> frame cycle.<br />

Spacecraft Clock at the<br />

end of image. This clock<br />

refers to the end of the <strong>SSI</strong><br />

frame cycle.<br />

<strong>Data</strong> portion <strong>for</strong> <strong>SSI</strong>3<br />

telemetry packet<br />

containing AACS. Values<br />

will be represented as<br />

ASCII strings in the <strong>for</strong>m<br />

1234.12 and null<br />

terminated. RA and DEC<br />

are in the EME50<br />

coordinate system<br />

CCD Fine Temperature and<br />

CCD Coarse Temperature<br />

Values from 0 to 255.<br />

See Appendix A <strong>for</strong><br />

temperature translation<br />

tables.<br />

Picture Count<br />

Increments every nonzero<br />

exposure and dark<br />

current calibration<br />

Exposure Number<br />

(See Appendix A)<br />

Commanded Gain<br />

0=Gain 1 = 400 K<br />

1=Gain 2 = 100 K<br />

2=Gain 3 = 40 K<br />

3=Gain 4 = 10 K<br />

Light Flood<br />

0=on<br />

1=off<br />

Valid For<br />

UDR <strong>REDR</strong> EDR<br />

• • •<br />

• • •<br />

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