Preliminary Results of Marine Gravity Anomaly and Bathymetry from SWOT Wide-Swath altimeter data

We explore the potential of Ka-band radar interferometry (KaRIn) data from the SWOT mission for marine gravity and bathymetry applications. Our evaluation includes determining the deflection of vertical (DOV) using the least squares collocation (LSC) method, recovering gravity anomalies with the inverse Vening-Meinesz (IVM) approach, and predicting bathymetry through the gravity-geological method (GGM). SWOT-derived gravity anomalies in the study area, located between 20ºN - 30ºN and 135ºE - 145ºE, lies at the convergence of the Pacific and Eurasian tectonic plates.  KaRIn data (only seven months) recovered gravity anomalies with an accuracy of 2.37 mGal, which is better than current models.

The details of the method are discussed in a manuscript submitted to GRL.