Look-up tables

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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