Import custom beams into fit_element / format of the cst files

[cvoegele]

We aim to supply custom beams to the fit_element app. For this purpose, we want to create custom CST files. Do you have an example CST file with some documentation? We know that the cst file requires a specific format based on amplitude and phases in theta and phi coordinates. We have an electromagnetic antenna beam patterns in the farfield approximation (XY). What is the convection you use for defining theta-phi coordinates for cst file? @rohitcbscient