## Calibration section

The CLASS calibration section is activated and partially filled if the metacard temperatureScale is defined. The rules are detailed in Table .

Table: Look-up table between the CLASS Calibration 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.
CLASS | Type | Value | Default
beeff | R*4 | Metacard forwardEff if metacard temperatureScale is T_A*, else | 0.0
|  | metacard beamEff if metacard temperatureScale is T_MB, else error |
foeff | R*4 | Metacard forwardEff | 0.0
gaini | R*4 | Metacard *sbGain (usb or lsb) | 0.0
tchop | R*4 | Metacard hbbTemp (level 2.5) or 1st value in Column hot_cold (level 2.0) | 0.0
tcold | R*4 | Metacard cbbTemp (level 2.5) or 2nd value in Column hot_cold (level 2.0) | 0.0