This file details the complete set of reference sky positions that apply to an observationD.3. A staring observation has one record per aperture; a raster observation has one record per raster point per raster. As the name suggests, these directions provide the reference points for the calculation of the OTF in the IIPH.
The IRPH file contains a primary header with the fields described in Table D.32. In this example non-mandatory fields are filled with example values.
| Keyword | Value | Description |
| 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 |
| ORIGIN = | 'ESA ' | / European Space Agency |
| TELESCOP = | 'ISO ' | / Infrared Space Observatory |
| COMMENT | Instrument Reference Pointing History | |
| FILENAME = | 'IRPH08300207' | / File name in ISO archive |
| DATE = | '12/02/96' | / Creation date |
| FILEVERS = | '0518 ' | / Version ID in ISO archive |
| OLPVERS = | 'OLP_242 ' | / SOC OLP system version |
| CALGVERS = | 'CALG_31 ' | / SOC OLP CAL-G files version |
| USERNAME = | 'PIPELINE' | / |
| CREATOR = | 'DERIVE_IPH v2.0' | / Application that created the file |
INSTRUME = |
'CAM ' | / Instrument identifier |
ATTRA = |
266.56054 | / Intended Instrument J2000 Right Ascension (degrees) |
| ATTDEC = |
+62.45108 | / Intended Instrument J2000 Declination (degrees) |
ATTTYPE = |
'R ' | / Type of attitude operation |
| ATTOTFTH = | 10.0 | / On-target threshold (arcsec) |
| ATTRNPTS = | 3 | / Number of points per raster line |
| ATTRNLNS = | 3 | / Number of raster lines |
| ATTRDPTS = | 92 | / Distance between adjacent points (arcsec) |
| ATTRDLNS = | 92 | / Distance between adjacent lines (arcsec) |
| ATTRORIE = | 1 | / Raster orientation flag (0 or 1) |
| ATTRROTA = | 0.0 | / Rotation of raster pattern (degrees) |
| ATTGUIDE = | 93715 | / Guide star reference number |
| ATTSAANG = | 88.7 | / Solar aspect angle (degrees) |
| ATTERROR = | 0 | / 0=OK, 1=target not acquired, |
| / 2=No STR/QSS misalignment | ||
| ATTMISQ1 = | 0.0000000 | / STR/QSS misalignment quaternion Q(1) |
| ATTMISQ2 = | -0.0004555 | / STR/QSS misalignment quaternion Q(2) |
| ATTMISQ3 = | -0.0002231 | / STR/QSS misalignment quaternion Q(3) |
| ATTMISQ4 = | 0.9999999 | / STR/QSS misalignment quaternion Q(4) |
| ATTINSQ1 = | 0.0000000 | / QSS/Instrument alignment quaternion Q(1) |
| ATTINSQ2 = | -0.0000181 | / QSS/Instrument alignment quaternion Q(2) |
| ATTINSQ3 = | 0.0012427 | / QSS/Instrument alignment quaternion Q(3) |
| ATTINSQ4 = | 0.9999992 | / QSS/Instrument alignment quaternion Q(4) |
| INSTRA = | 266.13155 | / Reference instrument J2000 right ascension (degrees) |
| INSTDEC = | +62.42157 | / Reference instrument J2000 declination (degrees) |
| INSTROLL = | 127.70 | / Reference instrument J2000 roll angle (degrees) |
| CINSTRA = | 266.13155 | / Corrected reference instrument J2000 right ascension (degrees) |
| CINSTDEC = | +62.42157 | / Corrected reference instrument J2000 declination (degrees) |
| CINSTROL = | 127.70 | / Corrected reference instrument J2000 roll angle (degrees) |
| VERS1 = | '0518/EOHA083' | / Version ID of each input file |
| VERS2 = | '0518/EOHI083' | / Version ID of each input file |
| VERS3 = | '0515/APPH083' | / Version ID of each input file |
| VERS4 = | '0456/IFPG' | / Version ID of each input file |
| VERS5 = | '1047/ISTR' | / Version ID of each input file |
| VERS6 = | '1047/SOLUN' | / Version ID of each input file |
| VERS7 = | '1350/ORBIT' | / Version ID of each input file |
Each record contains the fields described in Table D.33.
| Keyword | Number | Format | Description |
| RA0 | 1 | R8 | Raster centre reference right ascension, in degrees |
| DEC0 | 1 | R8 | Raster centre reference declination, in degrees |
| ROLL0 | 1 | R8 | Raster centre reference roll angle, in degrees |
| SPARE | 1 | I1 | Spare space |
| TYPE | 1 | A1 | Type of pointing operation |
| RPID | 2 | I1 | Raster pointer ID |
| UTC |
1 | I4 | UTC of start of observation, in seconds, since 1989.0 |
| STRQ | 4 | R8 | Star-Tracker point quaternion |
| INSQ | 4 | R8 | QSS/aperture alignment quaternion |
| RPQ | 4 | R8 | Raster point quaternion |
| RA |
1 | R8 | Uncorrected raster point reference right ascension, in degrees. |
| It is derived from the APPH file | |||
| DEC |
1 | R8 | Uncorrected raster point reference declination, in degrees |
| ROLL |
1 | R8 | Uncorrected raster point reference roll angle, in degrees |
| CORQ | 4 | R8 | Raster point correction quaternion |
| CRA | 1 | R8 | Corrected raster point reference right ascension, in degrees |
| CDEC | 1 | R8 | Corrected raster point reference declination, in degrees |
| CROLL | 1 | R8 | Corrected raster point reference roll angle, in degrees |
| OTFT | 1 | R4 | On-target flag threshold, in arcsec |
| APERTURE |
1 | C2 | Instrument/aperture combination (e.g. `S3') |
| FILLER | 2 | I1 | For alignment |