Polarimetry Parameters

These are outlined in the ``Output Data'' section of the polarimetry recipes such as POL_JITTER, and are calculated using standard formulae and the methods of POLPACK. A calibration correction (polrefang) measured in degrees clockwise is applied to the vector direction for the orientation of the analyser with respect to north based upon UKIRT's IRPOL instrument. Current values are -24 for Michelle and UIST, -9 for UFTI, and -96.3 for IRCAM. For other instruments, the offset can be determined using polarimetric-standard-star calibrations.
[_CALC_STOKES_, MICHELLE/_CALC_STOKES_NOD_CHOP_]