Category B

Version 3.0.1

BITPIX

BITPIX

This sets the flag in SPC for how many bits to treat the data. Everything is eventually converted into unsigned integer. For ORex, this is 16. The camera is a 14-bit imager, but the SPOC will pad the leading bits to 0 to make it a simple unsigned 16-bit integer. IF a LUT (look-up-table) is used, the SPOC will convert the 8-bit LUT into the standard 16-bit integers

DATE_OBS

UTC0

The UTC time of the observation. This is converted within SPC via SPICE into ET, setting both ET0 and ET.

EXPTIME

EXP

The duration of the exposure. It is used to calculate the midpoint of the exposure. This is _ used for OREx.

SCLK_STR

CLK0 and CKLUSE

This is the spacecraft clock. If this value is set in the FITS headers, it is the primary time used to calculate the midpoint of the exposure.

NAXIS1

NPX

NAXIS2

NLN

CAMERAID

CAM

MTR_POS

FLT

LUT

LUT

MCFWHTMP

NTX (1,1)

MapCam temperature. The final algorithm has not been decided yet. However, the weighting of each temperature can be adjusted in the file DN2TEMP.TXT. This assumes a linear mixing of the four camera temperatures.

MCFWMTMP

NTX (1,2)

see above

MCLENTMP

NTX (1,3)

see above

MCROETMP

NTX (1,4)

see above

SCFWHTMP

NTX (2,1)

SamCam temperature. The final algorithm has not been decided yet. However, the weighting of each temperature can be adjusted in the file DN2TEMP.TXT. This assumes a linear mixing of the four camera temperatures.

SCFWMTMP

NTX (2,2)

see above

SCLENTMP

NTX (2,3)

see above

SCROETMP

NTX (2,4)

see above

PCFWHTMP

NTX (3,1)

PolyCam temperature. The final algorithm has not been decided yet. However, the weighting of each temperature can be adjusted in the file DN2TEMP.TXT. This assumes a linear mixing of the four camera temperatures.

PCFWMTMP

NTX (3,2)

see above

PCLENTMP

NTX (3,3)

see above

PCROETMP

NTX (3,4)

see above

NCCHTEMP

NTX (4,0) and NTX (4,1)

NavCam temperature

TCCHTEMP

NTX (5,0) and NTX (5,1)

TAGCam temperature

SC_QA

QT(0)

Quadterians. OREx will write the spacecraft pointing information, as of when the image was taken, into the FITS header. process_fits will output them in the file quaternions.txt in the format PICNM, QT(I), I=0,3

SC_QX

QT(1)

see above

SC_QY

QT(2)

see above

SC_QZ

QT(3)

see above

BZERO

DDN and SIGNED

FORTRAN reads all integers as signed. If the data should be unsigned, then the DN values less than zero are converted into high-bit values.

INSTRUME

INAME and NC

This is the name of the instrument in human-readable form. It sets the variable NC as follows: