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Subsections



D.7 Executed Observation History per ICS (EOHI)

This is the Executed Observation History per ICS (Instrument Command Sequence) file.

D.7.1 Primary header

The EOHI file contains a primary header with the fields described in Table D.18. In this example non-mandatory fields are filled with example values.

Table D.18: EOHI primary header.
Keyword Value Description
SIMPLE = T /
BITPIX = 8 /
NAXIS = 0 /
EXTEND = T /
ORIGIN = 'ESA ' / European Space Agency
TELESCOP = 'ISO ' / Infrared Space Observatory
COMMENT   Information unconnected to a whole AOT
FILENAME = 'EOHI264 ' / 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' /

D.7.2 Records

The EOHI file contains records described in Table D.19.

Table D.19: EOHI records.
Keyword Number Format Description
EOHITDTN 1 A6 TDT number
EOHIOSN 1 A2 Observation Sequence Number (OSN)
EOHIUTC 1 A11 UTC of sending associated ICS (yydddhhmmss)
EOHIINST 1 A2 Prime instrument ID, followed by instrument aperture
EOHITDTC 1 A3 TDT Component part
EOHIMSG1 1 A64 AOT specific information on ICS level

D.7.3 CAM AOT specific information

No useful information is kept here for CAM.

D.7.4 LWS AOT specific information

For LWS the useful information contained in EOHIMSG1 is shown in Table D.20.

Table D.20: LWS EOHIMSG1 contents.
Check Character Contents
Requested S/N ratio 4  
Unused 12  
Spectrum number I2 Spectrum Number. For line spectra it is the number of the
    current line being observed. For wavelength ranges it
    indicates which part of the spectrum is being observed.
    (The wavelength range may be split into two parts, see
    AOT_VAR contents and also last three entries in this table.
Scan number I6 Indicates the current scan number being executed
    of the total number of scans required.
Zone number I4 Zone number, only AOTs L03 and L04
Wavelength 8 Wavelength as F8.4. For line spectra this gives the expected
    wavelength of the line being observed. For wavelength ranges
    it gives the wavelength of the reference line which
    determined the overall integration time
Incident Power 8 Incident Power as E8.2. For line spectra this gives
    the expected power for the line being observed. For
    wavelength ranges it gives the the power for the
    reference line which determined the overall integration time
Maximum scan I4 Maximum Scan half width as I4. Only used in line
    spectra AOTs (L02 and L04). Maximum number
    of mechanism steps that could be used to cover
    the line being observed.
Active Detector I2 Active Detector. For line spectra and L03 AOTs, the
    detector number used for the line being observed or
    measured spectrum. For L01 AOT, the detector corresponding
    to the reference line used to determine the integration time.
Number of scans I6 Total number of scans to be completed for
    the line or part of wavelength range.
Total Scans I4 Total number of scans per measurement to be
    completed for the line or part of wavelength range.
Illuminator flash I4 Number of scans to be made between illuminator
    flashes for the line or part of wavelength range.

D.7.5 PHT AOT specific information

For PHT the useful information contained in EOHIMSG1 is shown in Table D.21.

Table D.21: PHT EOHIMSG1 contents.
Check Character Contents
Requested S/N 4  
Type of source 1 Either `P' for point or `E' for extended
Unused 11  
Expected source flux 8  
Uncertainty 8 Uncertainty in above
Background 8 Maximum background flux
Subsystem 1 Identifies which subsystem is in use
Measurements 3 Number of measurements with subsystem
Unused 20  

D.7.6 SWS AOT specific information

For SWS the useful information contained in EOHIMSG1 is shown in Table D.22.

Table D.22: SWS EOHIMSG1 contents.
Check Character Contents
Unused A16  
Scan type A1 If `N' then normal resolution scan
    If `L' then low resolution scan
    If `R' then reference wavelength
SW Measurement I2 Measurement number SW section
    Blank if not applicable
LW Measurement I2 Measurement number LW section
    Blank if not applicable
SW detector band 1 Requested SW band. Blank, `1' or `2'
LW detector band 1 Requested LW band. Blank or `3' to `6'
SW Band flux 8 Expected flux in relevant SW band as Jy in F8.2
    Blank if not applicable
LW Band flux 8 Expected flux in relevant LW band as Jy in F8.2
    Blank if not applicable
Unused 25  


next up previous contents index
Next: D.8 General Housekeeping (GEHK) Up: D. Satellite Files Previous: D.6 Continuous Executed Observation
ISO Handbook Volume I (GEN), Version 2.0, SAI/2000-035/Dc