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CIRA-Pulsars-and-Transients-Group / vcstools

A suite of tools for processing MWA-VCS data
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Correct polarisation angle for azimuthal drift #117

Open robotopia opened 4 years ago

robotopia commented 4 years ago

The current "beam model" used in the beamformer (allegedly) doesn't correctly account for (or worse, erroneously introduces) the rotation of the sky over the course of an observation, resulting in a drift of the polarisation angle that matches the target's change in local azimuth over time. If this is true, it will be most noticeable for observations at or near zenith.

robotopia commented 4 years ago

This issue, if real, is likely related to this issue posted by John Morgan: https://github.com/MWATelescope/mwa_pb/issues/9