Numerical velocity determination and calibration methods for champ using the energy balance approach

verfasst von
M. Weigelt, N. Sneeuw
Abstract

More than two years of data of the CHAMP satellite mission is available and the usage of the energy balance approach for global gravity field recovery has been successfully implemented by several groups around the world. This paper addresses two important aspects of the data processing. First, high-quality gravity recovery requires numerical differentiation of kinematic positions. Two methods are investigated using simulated and real dynamic data. It is shown that a third order Taylor differentiator is sufficient to reach good results. Second, drift due to the accelerometer bias has to be corrected. Two possible approaches are discussed: cross-over calibration on the one hand, calibration w.r.t. a reference model on the other hand. Currently the crossover calibration fails due to the insufficient accuracy of the crossover determination whereas the calibration w.r.t. a reference model gives good results.

Externe Organisation(en)
University of Calgary
Typ
Artikel
Journal
International Association of Geodesy Symposia
Band
129
Seiten
54-59
Anzahl der Seiten
6
ISSN
0939-9585
Publikationsdatum
09.2005
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Computer in den Geowissenschaften, Geophysik
Elektronische Version(en)
https://doi.org/10.1007/3-540-26932-0_10 (Zugang: Unbekannt)
 

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