Abstract's details

The new CNES-CLS 2022 marine gravity anomaly model: first validation in the Mediterranean

Philippe Schaeffer (CLS, France)


Sean Bruinsma (CNES, France); Franck Reinquin (CNES, France)

Event: 2022 Ocean Surface Topography Science Team Meeting

Session: The Geoid, Mean Sea Surfaces and Mean Dynamic Topography

Presentation type: Type Poster

Contribution: PDF file


A new model of marine free-air gravity anomalies has been determined. It is based on the same data set used in the CNES CLS 2022 Mean Sea Surface determination. Particular attention was paid to the shortest wavelengths of less than 30 km. Furthermore, data sampling at 1 Hz (~7km) along track is not sufficient in this context. It is necessary to focus this new determination on the use of high-resolution data that are provided by a new generation of altimeters such as the Cryosat-2 (20 Hz) and SARAL (40 Hz) missions in the geodetic/drifting phase. However, at this rate, observations are too noisy and need application of a dedicated optimal filter.
We will present a validation of this new model based on a comparison with existing models, which were also derived from altimetry data.

Poster show times:

Room Start Date End Date
Mezzanine Tue, Nov 01 2022,17:15 Tue, Nov 01 2022,18:15
Mezzanine Thu, Nov 03 2022,14:00 Thu, Nov 03 2022,15:45
Philippe Schaeffer