A Matlab/Octave-suite of programs for simulating satellite orbits and retrieving gravity field information from satellite tracking data.
This suite is basically built for simulating satellite gravity field missions and their observables. The simulation itself is rather rudimentary, because it only deals with the spacecraft as a point mass. This means that one cannot simulate the spacecraft rigid body dynamics. Nevertheless, it is sufficient to analyse the behaviour of the orbit and to do some pre-mission analysis.