Evaluation and benchmarking of existing mitigation techniques for heterogenous beams

This is a continuation of the work in SP-788. We now have a MeerKAT+ simulation that produces visibilities with beam patterns from the MeerKAT and SKA dishes and have demonstrated the degraded image quality caused by them when imaging without any corrections for the beam effects.

The next step is to investigate mitigation techniques for heterogeneous beam effects in the image plane via the use of existing imagers that model these effects during convolutional gridding (DDFacet, wsclean) and during model prediction (MFBeam). As a first step, we should ensure we can produce beams for the two separate dish designs that are in the correct format to be used by the three packages and that the packages themselves are capable of supporting separate beams on a per-dish basis.