GAINS section

The GAINS section is not a part of the MBFITS raw-data format, and contains information relevant to data calibration (together with the weather data, that are written to the MONITOR section). There is a separate GAINS section for each frontend-backend combination (i.e. GAINS1, GAINS2 etc.).

GAINS1%PCOLD	$n_{\rm bd} \times n_{\rm pix} \times n_{\rm cpb}$ D		backend count rate of cold load
GAINS1%PHOT	$n_{\rm bd} \times n_{\rm pix} \times n_{\rm cpb}$ D		backend count rate on ambient load
GAINS1%PSKY	$n_{\rm bd} \times n_{\rm pix} \times n_{\rm cpb}$ D		backend count rate on sky
GAINS1%LCALOF	D	deg	longitude offset for sky measurement
GAINS1%BCALOF	D	deg	latitude offset for sky measurement
GAINS1%TAUZEN	$n_{\rm bd} \times n_{\rm pix}$D	Np	zenith opacity
GAINS1%TAUZENIMAGE	$n_{\rm bd} \times n_{\rm pix}$ D	Np	zenith opacity in image band
GAINS1%TATMS	$n_{\rm bd} \times n_{\rm pix}$D	K	atmospheric emission temperature
GAINS1%TATMI	$n_{\rm bd} \times n_{\rm pix}$D	K	atmospheric emission temperature (image band)
GAINS1%TSYS	$n_{\rm bd} \times n_{\rm pix}$D	K	system temperature
GAINS1%TRX	$n_{\rm bd} \times n_{\rm pix}$ D	K	receiver temperature
GAINS1%H2OMM	$n_{\rm bd} \times n_{\rm pix}$D	mm	precipitable water vapour
GAINS1%GAINARRAY	$n_{\rm bd} \times n_{\rm pix} \times n_{\rm cpb}$ D		gain array (= PHOT$-$PSKY)
GAINS1%FEBE	C*17		frontend-backend identification