Eugene, There are two programs named Skymap. The one you seem to be refering to is SkyMap Pro which is a planetarium/telescope control program which doesn't display satellites. The one that is frequently referred to on Seesat is a satellite prediction program written by Seesat member Rob Matson. I don't remember where it can be down- loaded from, but I'm sure another member can provide that info. Brad Feinner Los Alamitos, CA NZ6S Eugene M. Harriman II wrote: > > My question is: are SATOBS lines of data to be used in programs like > SKYMAP?