Quote:
Originally Posted by RickS
Ray,
The ultimate weighting tool is to leave the worst subs out of the integration, but PI also has a script (SubframeSelector) which allows you to calculate a weighting for each sub based on a collection of parameters including FWHM, Eccentricity and SNR. This script adds a weight value to the FITS header that is used during image integration.
Cheers,
Rick.
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Thanks Rick - looked it up following your first post - much appreciated
. I can understand weighting applied when adding noisy frames to a stack, but am still trying to understand what it means for resolution - do you understand it to mean that, if you only add a fraction of a dud frame, you can still get some SNR advantage from it without messing up the detail too much? I don't think that there is any resolution advantage in adding less well resolved data - seems to me that can only work to degrade resolution, even if weighted.
regards ray