CoAuthors

Jean-Michel Lemoine (CNES, France)

All the Ultra Stable Oscillators (USO) of DORIS satellites are more or less sensitive to the South Atlantic Anomaly (SAA) effect. The last DORIS satellites are also impacted in particular Jason-3. While awaiting a DORIS data corrective model for the satellites Jason-3 and Sentinel-3A, we propose here a strategy to minimize the SAA effect on the Precise Orbit Determination (POD) and on the station position estimation. First, we will show the impact on the Jason-3 and Sentinel-3A POD by showing statistical results such as one per revolution empirical acceleration amplitudes, orbit overlaps and orbit residuals. Secondly, we will give some comparisons to the precise orbits of the CNES used for altimetry (GDR-E) and of the ESA/ESOC Analysis Center. We will also show the impact on the DORIS positions of the SAA stations.