I'm amazed that in all of this, no one has mentioned Nyquist sampling - http://en.wikipedia.org/wiki/Nyquist...mpling_theorem
Hi Cam. Nyquist sampling was discussed in the thread below, which was linked to earlier
http://www.iceinspace.com.au/forum/s...ad.php?t=99472
"
the spreadsheet is nothing particularly special, but it does include the main variables and gives some idea of what is important. I wanted to look at system issues and used the Nyquist sampling requirement for a Gaussian - 2.35 pixel per FWHM - but of course, seeing cannot be predicted at anything like that precision, so 2 or 3 are probably just as useful."
regards Ray