The ASKAP instrument has a third axis, which is typically fixed to the sky throughout an observation. This information is recorded int he MS, and is used by fixms in order to correct the polarimetry for use in wsclean.
This original rotation should be recorded in a MSSummary object, which could come in handy when estimating the apparent sky brightness via the holography beams (which are not rotationally invariant).
The ASKAP instrument has a third axis, which is typically fixed to the sky throughout an observation. This information is recorded int he MS, and is used by
fixms
in order to correct the polarimetry for use in wsclean.This original rotation should be recorded in a MSSummary object, which could come in handy when estimating the apparent sky brightness via the holography beams (which are not rotationally invariant).