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 |