9.3 Standard processed (SPD) files

There are two files in this section:

SWSP SWS Standard Processed Data

SWGH SWS Glitch History Data

9.3.1 SWS Standard Processed Data

 

Headers

The SPD files contain primary headers described in Table 9.5. In this table example information is used to fill the header.

Most keywords are self explanatory, or have been described above. Those that are not include:

VERSn

This indicates the version numbers of the various files (ERD, CSH, Cal-G) used to generate this product.

Header keyword Contents Comment

SIMPLE  = T /

BITPIX  = 8 /

NAXIS  = 0 /

EXTEND  = T /

ORIGIN  = 'ESA ' / European Space Agency

TELESCOP = 'ISO ' / Infrared Space Observatory

INSTRUME = 'SWS ' / Instrument used

COMMENT   SWS Standard Processed Data

FILENAME = 'SWSP26400248' / File name in ISO archive

DATE  = '17/10/95' / Creation date 95/290

FILEVERS = '0399 ' / Version ID in ISO archive

OLPVERS  = 'LATEST ' / SOC OLP system version

USERNAME = 'JSTERNBE' / Unofficial data product

INSTRA  = 102.66474 /Reference instrument J2000 right ascension (deg

INSTDEC  = +21.81240 /Reference instrument J2000 declination (deg)

INSTROLL = 318.89 /Reference instrument J2000 roll angle (deg)

OBJECT  = 'TEST_OBJ' / Target ID as given by proposer

OBSERVER = 'KLEECH' / Proposer ID in ISO Mission DB

EQUINOX  = 2000.0 / Equinox

TMRATE  = 32 / Telemetry rate in Kbps (Kbits/sec)

EOHAUTCS = '96166223020' / Approx. UTC of start of observation

EOHAUTCE = '96166223818' / Approx. UTC of end of observation

EOHAAOTN = 'S07 ' / AOT name

EOHAPLID = 'KLTEST ' / Proposal ID

EOHAOSN  = '48 ' / Observation sequence number

EOHAPSN  = '0 ' / Pointing sequence number

EOHAPCAT = '1 ' / Proposal category

 

EOHACIND = ' ' / Calibration indicator

EOHATTYP = '2 ' / Target type

ATTUTCSL = '96166222532' / UTC of start time of slew to intended target

ATTUTCS  = '96166222627' / UTC of time of first arrival at intended target

ATTOTFTH = 10.0 / On-target flag threshold (arc secs)

ATTRA  = 102.66 / Intended Right Ascension of instrument viewing

ATTDEC  = 21.8 / Intended DEClination (with ATTRA)

ATTTYPE  = 'P ' / Type of attitude operation (P/R/T)

ATTGUIDE = 150002 / Guide star reference number

ATTSAANG = 115.9 / Solar aspect angle (degrees)

ATTERROR = 2 / CONTINGEncy flag(0=success; 1=target not acq'd)

TREFUTC1 = 235175420 / UTC (whole seconds since 01-01-1989)

TREFUTC2 = 8505250 / UTC (remaining fraction of second)

TREFUTK  = 1857816480 / ISO Uniform Time Key (UTK)

TREFITK  = 1857816480 / ISO INSTRUMENT Time Key (ITK)

TREFITKU = 0.04166666666667 / ITK unit length in seconds

TREFCOR1 = 235175420 / UTC of 1st reference time

TREFHEL1 = -253.41 / Heliocentric correction +(s) at TREFCOR1

TREFDOP1 = -13.92 / ISO velocity towards target (km/s) at TREFCOR1

TREFCOR2 = 235175659 / UTC of 2nd reference time

TREFHEL2 = -253.40 / Heliocentric correction +(s) at TREFCOR2

TREFDOP2 = -13.93 / ISO velocity towards target (km/s) at TREFCOR2

TREFCOR3 = 235175898 / UTC of 3rd reference time

TREFHEL3 = -253.39 / Heliocentric correction +(s) at TREFCOR3

TREFDOP3 = -13.94 / ISO velocity towards target (km/s) at TREFCOR3

COMMENT   Instrument Station Report was not available.

VERS1  = '0298/SSTA26400248' / Version ID of each input file

VERS2  = '0298/GEHK26400248' / Version ID of each input file

VERS3  = '0298/EOHI264' / Version ID of each input file

VERS4  = '0298/SWER26400248' / Version ID of each input file

VERS5  = '0388/SC01' / Version ID of each input file

VERS6  = '0388/SC03' / Version ID of each input file

VERS7  = '0388/SC04' / Version ID of each input file

VERS8  = '0388/SC02' / Version ID of each input file

VERS9  = '0388/SC06' / Version ID of each input file

VERS10  = '0388/SC05' / Version ID of each input file

VERS11  = '0388/SC16E' / Version ID of each input file

VERS12  = '0388/SC12' / Version ID of each input file

VERS13  = '0388/SC23' / Version ID of each input file

VERS14  = '0388/SC24' / Version ID of each input file

VERS15  = '0388/SC18' / Version ID of each input file

VERS16  = '0388/SC16A' / Version ID of each input file

VERS17  = '0388/SC16B' / Version ID of each input file

VERS18  = '0388/SC16C' / Version ID of each input file

 

Records

The SPD file contains records with the fields described in Table 9.6. In the FITS file they are defined in the binary header.

 

Field name Number Format Unit Comment

GPSCTKEY  1 I*4 Instrument time key

GPSCRPID  2 I*1 Raster point ID

GPSCFILL  1 I*2 Filler

SWSPSTAT  1 I*4 Status of this record

SWSPGPOS  2 R*4 Average positions for gratings 1/2

SWSPGANG  2 R*4 degrees Angles for SW & LW gratings

SWSPFPOS  1 I*4 Position of FP

SWSPFCUR  3 R*4 Average main current for FP coils

SWSPFGAP  2 R*4 Gaps for FP

SWSPWAVE  52 R*4 Detector wavelength

SWSPFLUX  52 R*4 Detector slopes  

SWSPOFFS  52 R*4 Number of 24 Hz samples used to calculate the slope

SWSPSTDV  52 R*4 Standard deviation of the detector slope

SWSPFLAG  52 I*4 Flags per detector

 

Notes:

1

One record is generated every reset interval (1, 2 or 4 seconds).

2

Because SWS has no raster  AOTs, the raster point IDs will always be set to 1 EXCEPT when tracking a Solar System Object.

3

The I*4 status number SWSPSTAT, one per measurement, can be decoded by referring to Table 9.7.

4

The I*4 status number SWSPFLAG, one per detector, can be decoded by referring to Table 9.8.

 

Meaning Bits set

dark 00000000000000000000000000000000 0

aperture 1  00000000000000000000000000000001 1

aperture 2  00000000000000000000000000000010 2

aperture 3  00000000000000000000000000000011 3

reset  band 1 & 2 00000000000000000000000000000100 4

reset other bands 00000000000000000000000000001000 8

reset all bands 00000000000000000000000000001100 12

diffuse cal normal 00000000000000000000000000010000 16

diffuse cal high 00000000000000000000000000110000 48

fp check normal 00000000000000000000000001000000 64

fp check high 00000000000000000000000011000000 192

flusher normal 00000000000000000000000100000000 256

flusher high 00000000000000000000001100000000 768

grating check normal 00000000000000000000010000000000 1024

grating check high 00000000000000000000110000000000 3072

fp nr 2 active 00000000000000000001000000000000 4096

BAND1 requested 00000000000000000010000000000000 8192

BAND2 requested 00000000000000000100000000000000 16384

BAND3 requested 00000000000000001000000000000000 32768

BAND4 requested 00000000000000010000000000000000 65536

BAND5 requested 00000000000000100000000000000000 131072

BAND6 requested 00000000000001000000000000000000 262144

fp execute flag 00000000000010000000000000000000 524288

FP run flag 00000000000100000000000000000000 1048576

low resolution scan 00000000001000000000000000000000 2097152

reference scan 00000000010000000000000000000000 4194304

photometric check  00000000100000000000000000000000 8388608

defined dark measurement  00000001000000000000000000000000 16777216

SW grating run flag 00000010000000000000000000000000 33554432

LW grating run flag 00000100000000000000000000000000 67108864

SW scan direction 00001000000000000000000000000000 134217728

LW scan direction 00010000000000000000000000000000 268435456

 

Notes

1 The value of SWSPSTAT may represent the sum of two or more bits.

 

Meaning Bits set

No order 00000000000 0

1 glitch  00000000001 1

2 glitches 00000000010 2

3 glitches 00000000011 3

Partly Out of limit 00000000100 4

Totally Out of limit 00000001000 8

No data 00000010000 16

Order 1 00000100000 32

Order 2 00001000000 64

Order 3 00001100000 96

Order 4 00010000000 128

Multiple orders (confused) 00011100000 224

Gain bit 1 = gain 1 01000000000 512

Gain bit 2 = gain 4 10000000000 1024

Gain bit 3 = gain 16 11000000000 1536

 

Notes

1 Bits 11 to 22 of SWSPFLAG are used internally by Derive-SPD and therefore contain no information useful to the observer.

2 The value of SWSPFLAG may represent the sum of two or more bits.

9.3.2 SWS Glitch History Data

 

This file has only been produced from OLP version 5 onwards.

Headers

The SWGH files contain primary headers described in Table 9.9. In this table example information is used to fill the header.

Most keywords are self explanatory, or have been described before.

 

Header keyword Contents Comment

SIMPLE  = T /

BITPIX  = 8 /

NAXIS  = 0 /

EXTEND  = T /

ORIGIN  = 'ESA ' / European Space Agency

TELESCOP = 'ISO ' / Infrared Space Observatory

INSTRUME = 'SWS ' / Instrument used

COMMENT   SWS Glitch History Data

FILENAME = 'SWGH28600101' / File name

DATE  = '17/10/95' / Creation date 95/290

FILEVERS = '0399 ' / Version ID in ISO archive

OLPVERS  = 'LATEST ' / SOC OLP system version

USERNAME = 'JSTERNBE' / Unofficial data product

EOHATTYP = '2 ' / Target type

VERS1  = '0298/SSTA26400248' / Version ID of each input file

VERS2  = '0298/GEHK26400248' / Version ID of each input file

VERS3  = '0298/EOHI264' / Version ID of each input file

VERS4  = '0298/SWER26400248' / Version ID of each input file

VERS5  = '0388/SC01' / Version ID of each input file

VERS6  = '0388/SC03' / Version ID of each input file

VERS7  = '0388/SC04' / Version ID of each input file

VERS8  = '0388/SC02' / Version ID of each input file

VERS9  = '0388/SC06' / Version ID of each input file

VERS10  = '0388/SC05' / Version ID of each input file

VERS11  = '0388/SC16E' / Version ID of each input file

VERS12  = '0388/SC12' / Version ID of each input file

VERS13  = '0388/SC23' / Version ID of each input file

VERS14  = '0388/SC24' / Version ID of each input file

VERS15  = '0388/SC18' / Version ID of each input file

VERS16  = '0388/SC16A' / Version ID of each input file

VERS17  = '0388/SC16B' / Version ID of each input file

VERS18  = '0388/IRPH28600101' / Version ID of each input file

VERS19  = '0388/ORBIT' / Version ID of each input file

VERS20  = '0388/SISR28600101' / Version ID of each input file

 

Records

The SWGH file contains records with the fields described in Table 9.10. In the FITS file they are defined in the binary header.

 

Field name Number Format Unit Comment

GPSCTKEY  1 I*4 Instrument time key

SWGHS_S1  52 I*2 Start sample of first glitch

SWGHS_E1  52 I*2 End sample of first glitch

SWGHHGT1  52 R*4 Glitch height of first glitch

SWGHS_S2  52 I*2 Start sample of second glitch

SWGHS_E2  52 I*2 End sample of second glitch

SWGHHGT2  52 R*4 Glitch height of second glitch

SWGHN_GL  52 I*2 Number of glitches