Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5486653 | Advances in Space Research | 2017 | 16 Pages |
Abstract
For high-precision relative POD which necessitates DD carrier-phase ambiguity fixing, in principle frequency-dependent PCV maps would be required. To this aim, use is made of an Extended Kalman Filter (EKF) that is capable of optimizing relative spacecraft dynamics and iteratively fixing the DD carrier-phase ambiguities. It is found that PCV maps significantly improve the baseline solution. CRV maps slightly enhance the baseline precision, more significantly they lead to a much better initialization of the ambiguity fixing. The GRACE single-satellite orbit solutions compare to within a few cm 3-dimensionally with state-of-the-art external orbit solutions and SLR observations, whereas for the baseline a consistency of better than 0.7Â mm with KBR observations is achieved.
Keywords
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Physical Sciences and Engineering
Earth and Planetary Sciences
Space and Planetary Science
Authors
X. Mao, P.N.A.M. Visser, J. van den IJssel,