NASA
NASA/GSFC/GMAT
General Mission Analysis Tool (GMAT) is a software system for trajectory optimization and mission analysis. Analysts use GMAT to design spacecraft trajectories, optimize maneuvers, visualize and communicate mission parameters, and understand a mission’s trade space. The GMAT project is a collaborative effort between NASA, the space community, and the open source community. The system contains new technology and is also a system for future technology development. To maximize technology transfer GMAT is open source and is licensed under the NASA Open Source Agreement.