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Comportement de l'oscillateur DORIS/Jason au passage de l'anomalie sud-atlantique |
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| Authors: | Pascal Willis Bruce Haines Jean-Paul Berthias Pierre Sengenes Jean-Louis Le Mouël |
| Institution: | 1. Institut géographique national, direction technique, 2, av. Pasteur, BP 68, 94160 Saint-Mandé, France;2. Jet Propulsion Laboratory, 4800 Oak Grove Dr, MS 238-600, Pasadena, CA 91109, USA;3. Centre national d''études spatiales, 18, av. Édouard-Belin, 31401 Toulouse cedex 4, France;4. Institut de physique du Globe de Paris, 4, place Jussieu, 75252 Paris cedex 05, France |
| Abstract: | We point out an acceleration of the DORIS clock on-board the Jason satellite during passes over the South Atlantic Anomaly (SAA). When this effect is ignored in the current geodetic positioning of the DORIS stations, derived coordinates show almost linear trends in time, corresponding to anomalous horizontal and vertical velocities of the order of 1 m yr?1. We propose a simple scientific explanation of this physical phenomenon that is corroborated by direct Jason/TOPEX clock comparisons with respect to the DORIS master beacons in Kourou and Toulouse. To cite this article: P. Willis et al., C. R. Geoscience 336 (2004). |
| Keywords: | géodésie spatiale orbitographie DORIS anomalie sud-atlantique SAA Jason satellite geodesy orbit determination DORIS South Atlantic Anomaly SAA Jason |
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