Traditional satellite constellation design has focused on optimizing global or zonal coverage with a minimum number of satellites. The number and size of individual satellites determines the overall constellation capacity. In some instances, it is desirable to deploy a constellation in stages to gradually expand capacity. This requires launching additional satellites and reconfiguring on-orbit satellites. A methodology for optimizing orbital reconfiguration of satellite constellations is thus presented in this thesis. The purpose of the project was to find a technical way for transforming an initial constellation with low capacity into a new constellation with higher capacity. The general framework was applied to LEO constellations of communication satellites. The modules implemented allow prediction of time and cost to reconfigure a fixed initial constellation A into a final constellation B. Due to the complexity of the problem and consequently to the inevitable approximations, the simulation provide
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