IMP incorporates a Fehlberg seventh order, thirteen evaluation RungeKutta integrator with error and step-size control to numerically integrate the equations of motion. The spherical gravity mode can be used to simulate Keplerian systems and is an excellent teaching tool for Orbital Mechanics. Sun gravity and pressure and Moon gravity effects are user-selectable. Almost optimum thrust guidance parameters are calculated automatically. Aerobraking to orbit is also an option.
Input is read from the user's input file to minimize real-time keyboard input.
Output includes vehicle state, orbital and guide parameters, event and total velocity changes, and propellant usage. The code is double precision. IMP carries the NASA case number MFS-28606. Additional Resources Open Channel Software runs entirely on Open Source Software. We return value to the Software community in the form of services and original software.