ddoctor 0 Posted November 27, 2020 What is the correct way to measure SNR using the ISIS program for a short segment of continuum? For example let's say a 10 angstrom segment from 6650 to 6660, I click on the profile tab and then click on the FWHM tab but I am not sure how to do the measurement specifically for that segment. Also what do the 3 separate SNR numbers mean: " SNR, SNR(2) and SNR(3). What is the difference between those? Thanks! Dave Share this post Link to post Share on other sites
Advertising By registering on Astrosurf, this type of ad will no longer be displayed. Planetary Astronomy Observing, imaging and studying the planets A comprehensive book about observing, imaging, and studying planets. It has been written by seven authors, all being skillful amateur observers in their respective domains. More information on www.planetary-astronomy.com
