This file contains raw AOCS data copied from telemetry frames 4, 12, 20 and 28, each of identical layout, used for the derivation of the pointing information included in the IIPH (see Section D.12) and IRPH (see Section D.13) files.
The AOCS file contains a primary header with the fields described in Table D.1. In this example non-mandatory fields are filled with example values.
Keyword | Value | Description |
SIMPLE = | T | / |
BITPIX = | 8 | / |
NAXIS = | 0 | / |
EXTEND = | T | / |
ORIGIN = | 'ESA ' | / European Space Agency |
TELESCOP = | 'ISO ' | / Infrared Space Observatory |
COMMENT | Raw AOCS frames | |
FILENAME = | 'AOCS01700101' | / File name in ISO archive |
DATE = | '09/07/95' | / Creation date |
FILEVERS = | '0298 ' | / Version ID in ISO archive |
OLPVERS = | 'OLP_21 ' | / SOC OLP system version |
CALGVERS = | 'CALG_31 ' | / SOC OLP CAL-G files version |
USERNAME = | 'PIPELINE' | / |
VERS1 = | '1082/EOHA017' | / Version ID of each input file |
VERS2 = | '1082/EOHI017' | / Version ID of each input file |
VERS3 = | '1082/APPH017' | / Version ID of each input file |
EQUINOX = | 2000.0 | / Equinox |
TMRATE = | 32 | / Telemetry rate in Kbps (Kbits/sec) |
The AOCS file contains records described in Table D.2.
Keyword | Number | Format | Description |
GEPRTKEY | 1 | I4 | UTK time key |
GEPRQUAL | 1 | I4 | Frame quality |
AOCSFRAM | 256 | I1 | Frame 4, 12, 20 or 28 |
The AOCSFRAM record is described in Table D.3.
Keyword | Number | Format | Description |
HEADER | 10 | I1 | Frame header |
TKEY | 1 | I4 | AOCS time, TUNIT=0.5s |
LAYOUT | 1 | I2 | Frame layout information |
ATTQUAT | 4 | I4 | Integer-coded attitude quaternion |
FSSX | 1 | I2 | FSS X output data |
FSSY | 1 | I2 | FSS Y output data |
GYRDATA | 4 | I2 | GYR1-4 output rate data |
SASDATA | 1 | I2 | SAS channels 1-9 output |
RWSSPD | 4 | I2 | RWL 1-4 speeds (tachometer output) |
TORQREQ | 3 | I2 | RWS & RCS torque requests |
WDSTAT | 1 | I2 | Watch Dog status word |
PDUADIG | 1 | I2 | Branch 1 RCS relay status |
PDUBDIG | 1 | I2 | Branch 2 RCS relay status |
PDUAMEMR | 1 | I2 | Contents of PDUA memory |
PDUBMEMR | 1 | I2 | Contents of PDUB memory |
ACCHW | 1 | I2 | ACC H/W status word |
AOCSSTAT | 1 | I2 | AOCS status word |
MODSDAT | 1 | I2 | Mode specific data |
INHISTAT | 1 | I2 | Inhibit status |
SCOMSTAT | 1 | I2 | Single word command status |
MCOMSTAT | 1 | I2 | Multiple word command status |
RMCSTAT | 1 | I2 | RMC status |
STRY | 1 | I2 | STR output Y-coordinate of guide star |
STRZ | 1 | I2 | STR output Z-coordinate of guide star |
STRMAGG | 1 | I2 | STR output magnitude of guide star |
STRSTAT1 | 1 | I2 | STR mode status information |
STRHC | 1 | I2 | STR health check status |
STRHK1 | 1 | I2 | STR housekeeping data |
REGULAR | 20 | I1 | Regular TM buffer |
STRHK2 | 1 | I2 | |
STRYOUT2 | 1 | I2 | |
STRZOUT2 | 1 | I2 | |
STRMAG2 | 1 | I2 | |
STRYOUT3 | 1 | I2 | |
STRZOUT3 | 1 | I2 | |
STRMAG3 | 1 | I2 | |
STRYOUT4 | 1 | I2 | |
STRZOUT4 | 1 | I2 | |
STRMAG4 | 1 | I2 | |
RASPOID | 2 | I2 | Raster point ID |
E_ATTIT | 3 | I4 | Integer-coded attitude error vector |
HSSENDOR | 1 | I2 | |
GSTARIN | 1 | I2 | |
IRREGULA | 98 | I1 | Irregular TM buffer |
TRAILER | 2 | I1 | Frame trailer |