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Autonomous orbit determination via Kalman filtering of gravity gradients
Abstract : Spaceborne gravity gradients are proposed in this paper to provide autonomous orbit determination capabilities for near Earth satellites. The gravity gradients contain useful position information which can be extracted by matching the observations with a precise gravity model. The extended Kalman filter is investigated as the principal estimator. The stochastic model of orbital motion, the measurement equation and the model configuration are discussed for the filter design. An augmented state filter is also developed to deal with unknown significant measurement biases. Simulations are conducted to analyze the effects of initial errors, data-sampling periods, orbital heights, attitude and gradiometer noise levels, and measurement biases. Results show that the filter performs well with additive white noise observation errors. Degraded observability for the along-track position is found for the augmented state filter. Real flight data from the GOCE satellite are used to test the algorithm. Radial and cross-track position errors of less than 100 m have been achieved.
Littérature citée [23 références]
https://hal-enac.archives-ouvertes.fr/hal-01294564
Contributeur : Laurence Porte Connectez-vous pour contacter le contributeur
Soumis le : mardi 29 mars 2016 - 14:34:26
Dernière modification le : mercredi 3 novembre 2021 - 08:10:32
Archivage à long terme le : : lundi 14 novembre 2016 - 08:00:58
Contributeur : Laurence Porte Connectez-vous pour contacter le contributeur
Soumis le : mardi 29 mars 2016 - 14:34:26
Dernière modification le : mercredi 3 novembre 2021 - 08:10:32
Archivage à long terme le : : lundi 14 novembre 2016 - 08:00:58
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Autonomous Orbit Determination...
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