Using Marine Data to Estimate the Accuracy of Free Air Gravity Anomaly Models Derived From Satellite Altimetry

Global gravity models from satellite altimetry missions have widely contributed to the improvement of knowledge over oceans. However, few are available with a validated accuracy model, as most recent V21 V32 Scripps Institution Oceanography (SIO). The aim this paper is propose method estimate any free air anomaly model derived marine data sets. main idea correlate error mean roughness on precise measurement areas. relationship obtained then generalized each point model. This grid eventually combined provided by models, reflecting errors related technology different satellites used. has been successfully applied successive versions SIO (from V18 V31) produce continuous grids North Atlantic Ocean. Validation results independent shows that proposed approach allows strongly improve estimation used models' which converges, whatever tested versions, toward minimal value 0.9 mGal flat