This may have come up before, but a search here didn't find anything. Anyway, the trend is to lots of short subs with the modern CMOS cameras. I've just run into memory problems (32 GB on a linux system) trying to do 350 20 second subs. There is no real reason to do 20 seconds except to avoid saturating bright stars. My guiding could support longer. So my question is wouldn't it be a fairly simple script or process to take a directory of subs and output half or 1/3 as many with the FITS pixel values being an average of the input fits pixels, and the header adjusted to a synthetic longer image? If the combined FIITS are OK within your guiding limits, wouldn't this be a simple solution to some of the memory issues in processing? I posted something about this in the Sharpcap forum, but Robin didn't think there was any real need for such a thing. I find that there is. Thanks,
John
John