Abstract : Consisting of three pairs of accelerometers, the gradiometer is an ideal sensor for passive navigation. This paper proposes the use of gravity gradients for spacecraft positioning and the real-world GOCE EGG data are tested to investigate the feasibility. The basic observation equation is first formulated by considering white noise only, and a Least-Square position searching method is developed. The raw GGT measurements are preprocessed before the test in order to remove the low-frequency errors. By using a 120-degree EGM2008 gravity model as a reference map, position solutions with an accuracy of hundreds of meters are obtained. A further semi-simulation study shows that an accuracy of tens of meters could be achieved with a better gradiometer.
Type de document :
Communication dans un congrès
5th International GOCE user workshop, Nov 2014, Paris, France
https://hal-enac.archives-ouvertes.fr/hal-01159184
Contributeur : Laurence Porte
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Soumis le : mardi 2 juin 2015 - 17:13:06
Dernière modification le : vendredi 9 février 2018 - 20:36:01
Document(s) archivé(s) le : lundi 24 avril 2017 - 23:24:01
Xiucong Sun, Pei Chen,, Yalong Han, Christophe Macabiau, Chao Han,. Test of GOCE EGG data for spacecraft positioning. 5th International GOCE user workshop, Nov 2014, Paris, France. 〈hal-01159184〉
