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astronomy-laboratory / pyoof

pyoof is a Python package which performs out-of-focus (OOF) holography on astronomical beam maps for single-dish radio telescopes.
BSD 3-Clause "New" or "Revised" License
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Set up an automatic FFT resolution #7

Open tcassanelli opened 1 year ago

tcassanelli commented 1 year ago

The FFT resolution limits the seed of the computation. The problem is, given a value of micrometer precision (in the phase aperture distribution) that we'd like to achieve, what is the optimum and best FFT resolution need for this? So far we've been just setting this by eye but there must be an optimum, recommended value. This corresponds to the resolution key: https://github.com/AstroLab-UChile/pyoof/blob/94d1e324837ededf2b1886ed1ebdfcebd2fa7474/pyoof/aperture/aperture.py#L514-L523

VicentePenaLet commented 1 year ago

I was thinking of the best way to go about this issue, my first idea would be to determine the relationship between the distance of adjacent points of the grid used for the FFT with the wavelenght of the observation that leads to a good enough fit. Does this makes sense to you?

tcassanelli commented 1 year ago

I am not following.