Welcome to the home of our Satellite Orbit Simulator (SOS).

SOS is a free for non-commercial use, educational software package.

It allows you to go from learning the fundamentals of Orbital Mechanics to designing complex missions.
There is a written tutorial on how to use the software to design missions, with links to demonstration project files.
You can also download satellite orbit information (TLEs ) to show where a satellite, or space station, is now, or will be in the future.