Quote:
Originally Posted by Shiraz
Hi Eric.
Agree that the atmosphere cannot be known a-priori, but I don't think that you need this - surely you can just measure the stellar profile in the stacked image at processing time and use that as your PSF for deconvolution. regards Ray
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If you measure it from your image and it changes for every image and you can't remove it with a reversible mathematical transformation, I can't see how it can be called calibration.
Those semantics aside, yes the PSF of each star is the clue that allows deconvolution to enhanced the not point-source bits. It presumes (very important clause here, because it's not always right!) that the math that transforms the crappy PSF into the desired perfectly shaped/narrower gaussian also applies to your nebula etc.
EB