Pre-GRACE era recovery of time-varying DORIS-based mass concentration parameters for TOPEX/Poseidon precise orbit determination.

John Moyard (CNES, France)

Alexandre Couhert (CNES, France); Flavien Mercier (CNES, France)

Event: 2018 IDS Workshop

Session: SESSION III: Precise Orbit Determination

Presentation type: Oral

DOI: 10.24400/312072/i03-2018.2466

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Abstract

Local mass anomalies, i.e. mascons, are discussed here to complement to the GRACE-derived time-varying gravity field models used in the standard POD solutions. Relying on multi-missions DORIS measurements, both long-term and seasonal variations are investigated.In this paper, we present the results of an analysis based on the ‘mascons’ approach to improve the performance of the reprocessed TOPEX/Poseidon (T/P) precise orbits in the last CNES GDR-F standards. The SPOT-2 and SPOT-4 missions, launched in 1990 and 1998, respectively, as well as the T/P DORIS tracking measurements, are used here to leverage these data into the pre-GRACE era (before 2002).

Contribution: IDS18_s3_Moyard_MasconForPOD.pdf (pdf, 1386 ko)

Corresponding author:

John Moyard

CNES

France

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