Keywords: class-herschel-fits

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## Frequency Switch section

This section is enabled and filled in the CLASS observation header if the FITS card `OBS_MODE` contains the string `FSwitch` and if a non-null LO throw value is found in the FITS data.

Table: Look-up table between the CLASS Frequency Switch 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. Some values are not read from the FITS but explicitly set.
CLASS | Type | Value | Default
`nphas` | I*4 | 2 |
`swmod` | I*4 | Metacard `isFolded` (T/F), translated to CLASS internal code | code for False
`decal[1]` | R*8 | 0.d0 |
`duree[1]` | R*4 | 1.0 |
`poids[1]` | R*4 | +0.5 |
`decal[2]` | R*8 | Column `LoThrow` else `lothrow` (level 2.0), or |
|  | Metacard `LoThrow` else `loThrow` (level 2.5) |
`duree[2]` | R*4 | 1.0 |
`poids[2]` | R*4 | -0.5 |

Next: Herschel-HIFI section Up: Look-up tables Previous: Calibration section Contents