Abstract
The Disaster Monitoring Constellation CDMC) is an international consortium, currently consisting of four remote-sensing satellites in a ‘string of pearls’ configuration in a sun-synchronous low Earth orbit. This paper examines the orbit acquisition problem for the DMC. A low-cost, accurate and practical solution utilising the natural dynamics for 3D constellation establishment in the form of a closed-loop controller is briefly introduced. Perturbative effects such as drag and Earth oblateness are also incorporated to maintain long term accuracy. The preliminary in-orbit results from the Disaster Monitoring Constellation orbit acquisition demonstrate both the accuracy of the algorithm as well as potewntial flexibilities in view of unforeseen operational constraints.
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