I have the following (experimental) image, with its correponding raw data in .csv format here.
The pattern represents the scattering of a laser field off a point defect located in the center. One can clearly see a V-like shape of the scattered waves (here drawn in green). Unfortunately, there is also quite a lot of back-scattering going on, resulting in the very closely spaced parabolic waves running in the opposite direction.
I would like to find an fft-based method for filtering out all the secondary waves, leaving only the V-shaped ones.