Satscape

Satscape uses the SGP4 calculation model, which is highly accurate, even when the keplerian elements are old. It will continue to be donationware until further notice, and you may use the full program without any restrictions forever.

Satscape produces real-time displays of where any Satellite is, and predicts passes for your locale. There are about 8000+ satellites in orbit, a lot of these are just junk and debris such as discarded rocket bodies, but quite a few are working Satellites.Their positions can be calculated very accurately using pure maths, no need for a huge radar dish in your back garden. Satscape will do the maths for you, and present their positions in a nice graphical way. Passes over your part of the world can be predicted weeks in advance in a matter of seconds.

Java Runtime