It visualizes the monthly graphs of the brightest satellites of Jupiter and Saturn. The created images can have saved or printed. Freeware.
Our Review: Sat does exactly what it says it does, graphing the positions of the four largest satellites of Jupiter and Saturn. While these satellites will no doubt be important to the future of man's exploration and settlement of the solar-system, most people aren't going to be interested in the graphs. For those who are, there are a few other Jovian satellite programs which you should also check out. Still, Sat is free, and if you can put up with a dodgy interface the lack of features then this is still a worthy download.