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The orbit determination and maintenance are always required for space missions due to the existence of uncertainties. In an unstable orbit dynamics environment, such as libration point orbits in the r...estricted three-body problem, the performance of orbit determination and maintenance will be severely influenced by the unstable characteristics. This paper proposes an integrated approach for orbit determination and maintenance for spacecraft subject to an unstable dynamics environment. X-ray pulsar navigation is introduced to determine the orbit of spacecraft under the unstable dynamics environment. Then a new orbital maintenance strategy is proposed for libration point orbits mission, exploiting the effect of the hyperbolic instability of libration point orbits. Simulation results for the Earth-Moon L2 halo orbit present the effectiveness of the integrated approach.続きを見る
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