This is the Executed Observation History per ICS (Instrument Command Sequence) file.
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.
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' | / |
The EOHI file contains records described in Table D.19.
No useful information is kept here for CAM.
For LWS the useful information contained in EOHIMSG1 is shown in Table D.20.
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. |
For PHT the useful information contained in EOHIMSG1 is shown in Table D.21.
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 |
For SWS the useful information contained in EOHIMSG1 is shown in Table D.22.
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 |