get_tellcor_factor¶
- sofia_redux.calibration.pipecal_util.get_tellcor_factor(header, config, update=False, use_wv=False)[source]¶
Retrieve a telluric correction factor from configuration.
The correction factor is calculated from the ratio of the R value at the reference ZA and altitude/PWV to the R value at the observed ZA and altitude/PWV. R values are calculated by
pipecal.pipecal_rratio.pipecal_rratio
. The returned value is intended to be multiplied into the data, in order to correct it to the reference values.Observed values for ZA and altitude or PWV are read from the FITS header.
- Parameters:
- header
astropy.io.fits.header.Header
The FITS header to update.
- configdict-like
Calibration configuration values, as produced by
pipecal.pipecal_config.pipecal_config
.- updatebool, optional
If set, calibration keywords will be updated.
- use_wvbool, optional
If set, precipitable water vapor will be used as the reference value, instead of altitude.
- header
- Returns:
- float
The telluric correction factor.