Hi Bob! I use Nader's ST2NH's Dopppler .SQF file I found on his website when I first setup SATPC32. This one is about 1 year old so your gonna have to edit some of the new satellites and modes in but this will do the majority of the work for you! http://st2nh-blogger.blogspot.com/2018/10/dopplersqf-for-satpc32.html?spref=tw 73 Nick KE8AKW