Hi, I wrote this little program to try and help out with the great Doppler.sqf files posted on the AMSAT-UK web site. http://amsat-uk.org/satellites/doppler-sqf-2/ In the remote possibility that it could be of interest or use to someone else here is the link. http://www.tomdoyle.org/DopplerSqfEditor 73 W9KE Tom Doyle