Add satellite RFI simulations

[sfiruch]

Marta Spinelli has code that does RFI modelling from satellites (maybe other sources as well). Having RFI is important for intensity mapping, probably for other use cases as well.

[Lukas113]

This sounds pretty useful. I've read chapter 3.1 of ska-low-sim (released on Nov 2021). There they've set up an RFI simulation for ska-low using OSKAR, RASCIL and Pycraf:

• Pycraf calculates the expected propagation attenuation of the ska-low between transmitter and receiver as a HDF5 file.
• OSKAR calculates the directional beam gain in the direction of each transmitter. It inputs and outputs a HDF5 file.
• RASCIL simulates the visibilities and outputs a .fits image or a .ms file.

I think the RFI from satellites should be added to this somehow if possible.

I am not sure if these scripts also work for ska-mid by just changing the location dependent files. Probably not.