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Generating High Quality Schedules for a Spacecraft Memory Downlink Problem

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Generating High Quality Schedules for a Spacecraft Memory Downlink Problem
This work introduces a combinatorial optimization problem called Mars Express Memory Dumping Problem (Mex-Mdp), which arises in the European Space Agency program Mars Express. It concerns the generation of high quality schedules for the spacecraft memory downlink problem. Mex-Mdp is an NP-hard combinatorial problem characterized by several kinds of constraints, such as on-board memory capacity, limited communication windows over the downlink channel, deadlines and ready times on the observation activities. The contribution of this paper is twofold: on one hand it provides a CSP model of a real problem, and on the other it presents a set of metaheuristic strategies based on local and randomized search which are built around the constraint-based model of the problem. The algorithms are evaluated on a benchmark set distilled from ESA documentation and the results are compared against a lower bound of the objective function.
Angelo Oddi, Nicola Policella, Amedeo Cesta, Gabri
Added 06 Jul 2010
Updated 06 Jul 2010
Type Conference
Year 2003
Where CP
Authors Angelo Oddi, Nicola Policella, Amedeo Cesta, Gabriella Cortellessa
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