MarsMoonSim:

Path: Interplanetary/Mars

% Spacecraft simulation around Mars with Phobos and Deimos
 You can select orbital elements for the spaceraft The initial states for
 Phobos and Deimos are from the NASA Horizons system. Uses RK4 to
 propagate the orbits.

   http://ssd.jpl.nasa.gov/horizons.cgi 

 See also RHSMarsOrbit, RPRA2AE, El2RV, PlotPlanetOrbit, Constant, RK4
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