Interplanetary flights from Earth to the planets are an important part of the space effort. Each flight requires a signficant detailed study, choosing a mission profile from an infinite set of possible combinations. A rapid, flexible Earth-Mars mission analysis program has been developed to assist in this planning process.
This program was not released by NASA through COSMIC. The source code was obtained from an OCR scan of NASA Technical Notes D-5985 and D-5104..
This computer program is superceded by the current NASA project called "General Mission Analysis Tool (GMAT)." You might get some feel for how things were done in the early days with this code and you might be overwhelmed by GMAT, so I continue to offer the code. If you do a search for "NASA GMAT", you should get dozens of web sites that can bring you up to date. System Tool Kit (STK) from Analytical Graphics, Inc. is another modern planning program.