ImageIntegration is very powerful, Greg. If you do an initial integration with no rejection you can determine a best case noise reduction target (the median noise reduction number printed on the Process Console.) Then you can play with rejection algorithms and parameters to see how close you can get while still rejecting hot pixels, cosmic rays, satellite trails, etc. It's a bit time consuming but certainly squeezes the best out of your hard-earned data.
Cheers,
Rick.
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