Calculate bolometer responsivity from stored flatfield solution
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syntax. An
example can be found in $STARLINK_DIR/share/smurf/resist.cfg [$STARLINK_DIR/share/smurf/resist.cfg] Works on all raw data files. The responsivity image will be identical for all files in a single observation since it is only updated following a FLATFIELD observation.
Provenance is not propagated to the output files, since the output files do not depend on the bolometer data.
The responsivity data are filtered using a signal-to-noise ratio of 5.0. The number of bolometers passing this criterion is reported in the NGOOD parameter. The variance is stored in the output files so additional filtering is possible.
For TABLE flatfields the CALCFLAT calculation of responsivity can use the variance of each measurement to calculate a weighted fit. The data files themselves do not store the variance in the flatfield solution so the answer from CALCRESP may differ slightly to the answer calculated with CALCFLAT.