Most keywords are self-explanatory, or have been described above. Those that 
are not are INSTRA, INSTDEC and 
INSTROLL. These are the instruments pointing direction and 
roll, and are described in the ISO Handbook Volume I, 
[17].
Table A.4:
 SPD primary headers
| Header keyword |  | Contents |  | Comment | 
| SIMPLE | = | T | / | file does conform to FITS standard | 
| BITPIX | = | 8 | / | number of bits per data pixel | 
| NAXIS | = | 0 | / | number of data axes | 
| EXTEND | = | T | / | FITS dataset may contain
extensions | 
| COMMENT | FITS (Flexible Image Transport System)
format defined in Astronomy and | 
| COMMENT | Astrophysics Supplement Series v44/p363,
v44/p371,v73/p359,v73/p365. | 
| COMMENT | Contact the NASA Science Office of 
Standards and Technology for the | 
| COMMENT | FITS Definition document #100 and 
other FITS formation. | 
| ORIGIN | = | 'ESA     ' | / | European Space
Agency | 
| DATE | = | '2001-12-17' | / | Creation date 2001/351
2001/303 | 
| TELESCOP | = | 'ISO     ' | / | Infrared Space
Observatory | 
| INSTRUME | = | 'SWS     ' | / | Instrument used | 
| COMMENT | SWS Standard Processed Data | 
| FILENAME | = | 'SWSP62400216' | / | File name | 
| FILEVERS | = | '2693    ' | / | Version ID (derived from creation
date) | 
| OLPVERS | = | 'OLP_101 ' | / | SOC OLP system
version | 
| CALGVERS | = | 'CALG_71 ' | / | SOC OLP CAL-G files
version | 
| USERNAME | = | 'PIPEPAR' | / | Product not catalogued | 
| OBJECT | = | '200400 MARS' | / | Target ID as given by
proposer | 
| OBSERVER | = | 'TDEGRAAU' | / | Proposer ID in ISO Mission
DB | 
| EQUINOX | = | 2000.0000 | / | Equinox | 
| TMRATE | = | 32 | / | Telemetry rate in Kbps
(Kbits/s) | 
| EOHAUTCS | = | '97212233059' | / | Approx. UTC of start of
observation | 
| EOHAUTCE | = | '97213001349' | / | Approx. UTC of end of
observation | 
| EOHAAOTN | = | 'S06     ' | / | AOT name | 
| EOHAPLID | = | 'MARS_A  ' | / | Proposal ID | 
| EOHAOSN | = | '16      ' | / | Observation sequence
number | 
| EOHAPSN | = | '00      ' | / | Pointing sequence
number | 
| EOHAPCAT | = | '1       ' | / | Proposal category | 
| EOHACIND | = | '        ' | / | Calibration
indicator | 
| EOHATTYP | = | '001     ' | / | Target type | 
| ATTUTCSL | = | '97212233032' | / | UTC of start time of slew to intended
target | 
| ATTUTCS | = | '97212233041' | / | UTC of time of first arrival at intended
target | 
| ATTOTFTH | = | 10.000000 | / | On-target flag threshold (arc
secs) | 
| ATTRA | = | 200.20242 | / | Intended Right Ascension of instrument
viewing | 
| ATTDEC | = |  8.9580800 | / | Intended DEClination (with
ATTRA) | 
| ATTTYPE | = | 'T       ' | / | Type of attitude operation
(P/R/T) | 
| ATTGUIDE | = | 72040 | / | Guide star reference
number | 
| ATTSAANG | = | 73.200000 | / | Solar aspect angle
(degrees) | 
| ATTERROR | = | 0 | / | CONTINGEncy flag(0=success; 1=target not
acq'd) | 
| TREFUTC1 | = | 270775859 | / | UTC (whole seconds since
01-01-1989) | 
| TREFUTC2 | = | 8492230 | / | UTC (remaining fraction of
second) | 
| TREFUTK | = | 1324988640 | / | ISO Uniform Time Key
(UTK) | 
| TREFITK | = | 1324988640 | / | ISO INSTRUMENT Time Key
(ITK) | 
| TREFITKU | = | 0.041666667 | / | ITK unit length in
seconds | 
| TREFCOR1 | = | 270775859 | / | UTC of 1st reference
time | 
| TREFPHA1 | = | 624.25378 | / | Orbital phase at
TREFCOR1 | 
| TREFHEL1 | = |  146.18 | / | Heliocentric correction +(s) at
TREFCOR1 | 
| TREFDOP1 | = |  29.50 | / | ISO velocity towards target (km/s) at
TREFCOR1 | 
| TREFCOR2 | = | 270777144 | / | UTC of 2nd reference
time | 
| TREFPHA2 | = | 624.26868 | / | Orbital phase at
TREFCOR2 | 
| TREFHEL2 | = |  146.30 | / | Heliocentric correction +(s) at
TREFCOR2 | 
| TREFDOP2 | = |  29.46 | / | ISO velocity towards target (km/s) at
TREFCOR2 | 
| TREFCOR3 | = | 270778429 | / | UTC of 3rd reference
time | 
| TREFPHA3 | = | 624.28359 | / | Orbital phase at
TREFCOR3 | 
| TREFHEL3 | = |  146.42 | / | Heliocentric correction +(s) at
TREFCOR3 | 
| TREFDOP3 | = |  29.42 | / | ISO velocity towards target (km/s) at
TREFCOR3 | 
| ISRRSEV | = | 1 | / | RTA maximum severity level =
WA | 
| ISRQSEV | = | 1 | / | QLA maximum severity level =
WA | 
| ISRRWARN | = | 'OK       ' | / | RTA warning flag from IS
user | 
| ISRNOOSL | = | 0 | / | No. of out-of-soft-limit
errors | 
| ISRNOOHL | = | 0 | / | No. of out-of-hard-limit
errors | 
| ISRNMW | = | 0 | / | No. of monitor
warnings | 
| ISRNCVW | = | 0 | / | No. of command verification
errors | 
| ISRNBTW | = | 0 | / | No. of bad telemetry
errors | 
| ISRNMVW | = | 0 | / | No. of memory verification
errors | 
| ISRNSQLA | = | 0 | / | No. of severe QLA errors | 
| INSTRA | = | 200.20242 | / | Reference instrument J2000 right ascension
(deg | 
| INSTDEC | = |  8.9580700 | / | Reference instrument J2000 declination
(deg) | 
| INSTROLL | = | 292.04000 | / | Reference instrument J2000 roll angle
(deg) | 
| CINSTRA | = | 200.20250 | / | Corrected reference instrument J2000 right
asce | 
| CINSTDEC | = |  8.9579100 | / | Corrected reference instrument J2000
declinatio | 
| CINSTROL | = | 292.04000 | / | Corrected reference instrument J2000 roll
angle | 
| AOTVERS | = | '03.70   ' | / | AOT-to-OCT logic version | 
| VERS4 | = | 'ssta62400216' | / | Version of each input
file | 
| VERS5 | = | 'gehk62400216' | / | Version of each input file | 
| VERS6 | = | 'eohi624 ' | / | Version of each input file | 
| VERS7 | = | 'swer62400216' | / | Version of each input file | 
| VERS8 | = | 'irph62400216' | / | Version of each input file | 
| VERS10 | = | 'cal04_010.fits'  | / | CAL04: isp_drange | 
| VERS11 | = | 'cal02a_010.fits' | / | CAL02A: isp_midbit | 
| VERS12 | = | 'cal02_010.fits' | / | CAL02: isp_ac_correction | 
| VERS13 | = | 'cal03_010.fits' | / | CAL03: isp_ac_correction | 
| VERS14 | = | 'cal03_010.fits' | / | CAL03: isp_self_pulse | 
| VERS15 | = | 'cal05_010.fits' | / | CAL05: isp_self_pulse | 
| VERS16 | = | 'cal06_010.fits' | / | CAL06: isp_self_pulse | 
| VERS17 | = | 'cal01_010.fits' | / | CAL01: isp_cross_correction | 
| VERS18 | = | 'cal03_010.fits' | / | CAL03: isp_slope | 
| VERS19 | = | 'cal05_010.fits' | / | CAL05: isp_slope | 
| VERS20 | = | 'cal06_010.fits' | / | CAL06: isp_slope | 
| VERS21 | = | 'calibration_structure'  | / | CAL16ET: isp_slope | 
| VERS22 | = | 'cal03_010.fits' | / | CAL03: isp_wave | 
| VERS23 | = | 'cal16a_011.fits' | / | CAL16A: isp_wave | 
| VERS24 | = | 'cal16b_010.fits' | / | CAL16B: isp_wave | 
| VERS25 | = | 'cal16c_010.fits' | / | CAL16C: isp_wave | 
| VERS26 | = | 'calibration_structure' | / | CAL16ET: isp_wave | 
| VERS27 | = | 'cal23_011.fits' | / | CAL23: isp_wave | 
| VERS28 | = | 'cal24_010.fits' | / | CAL24: isp_wave | 
| VERS29 | = | 'cal12_010.fits' | / | CAL12: isp_fpgap | 
| VERS30 | = | 'cal18_010.fits' | / | CAL18: isp_fpwave | 
| END |  |  |  |  | 
This product has been produced from OLP Version 5, with the files named 
swgh*.fits.