The Monte Carlo Investigation of Trajectory Operations and Requirements (MONITOR) program was developed to perform spacecraft mission maneuver simulations for geosynchronous, single maneuver, and comet encounter type trajectories. MONITOR is a multif

Maximum Likelihood (ML) criteria and maximum a posteriori (MAP) criterion, Including orbital maneuvering simulation, initial orbit calculation, Including Deng's correlation, absolute correlation, correlation of slope, improved absolute correlation.