Look-up tables
Keywords: class-herschel-fits

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Look-up tables

We describe here, section by section, how the CLASS observation header is filled from the Herschel-HIFI FITS header and data. You can refer to the CLASS or Herschel-HIFI documentations for the exact specification of each component. The concept of FITS cards and metacards is explained in the section .

Table: Look-up table between the CLASS General section and the Herschel-HIFI FITS. Depending on the FITS structure (pipeline level), some elements found in a FITS header or in a FITS binary table. FITS names are case sensitive. The elements not described here are set to their usual undefined value in CLASS.
Name | Type | Value | Default
`num` | I*8 | Automatic |
`ver` | I*4 | 1 |
`teles` | C*12 | `HIF-LL-SP-BB` where: |
|  | - `LL` is `00` (level 2.5) or the subband number in the column `flux_*` |
|  | name (level 2.0), | `00`
|  | - `S` is the spectrometer, `W` for WBS or `H` for HRS (1st letter of the |
|  | card `BACKEND`, else of the metacard `polarization`) | Blank
|  | - `P` is the polarization, `V` or `H` (5th letter of the card `BACKEND`, else |
|  | of the metacard `polarization`) | Blank
|  | - `BB` is the band name (2 first letters of the card `BAND`) | Blank
`dobs` | I*4 | Integer part of average of card `DATE-OBS` and card `DATE-END` | Current day
`dred` | I*4 | Current day |
`kind` | I*4 | CLASS internal code for spectroscopic data |
`qual` | I*4 | CLASS internal code for unknown quality |
`scan` | I*8 | Metacard `bbtype` (level 2.5) or column `bbtype` (level 2.0) | 0
`subscan` | I*4 | Metacard `bbnumber` (level 2.5) or column `bbnumber` (level 2.0) | 0
`ut` | R*8 | Fractional part of average of card `DATE-OBS` and card `DATE-END` | Current time
`tau` | R*4 | 0.0 |
`tsys` | R*4 | Metacard `tsys_median` (level 2.5) or column `tsys_median` (level 2.0) | 0 K
`time` | R*4 | Metacard `integrationTime` (level 2.5) or |
|  | column `integrationTime` (level 2.0) | 0 sec

Subsections

- Intensity array
- General section
- Spectroscopic section
- Position section
- Calibration section
- Frequency Switch section
- Herschel-HIFI section
- Associated Arrays

Next: Intensity array Up: class-herschel-fits Previous: Going from to Contents