Effect of Current-Wave Interaction on Ocean Surface Current Retrieval Using Doppler Centroid Anomaly (DCA) Method

This paper investigates the effect of current-wave interaction on the ocean surface current (OSC) retrieval under the DCA framework using an improved Doppler radar imaging model (IDopRIM). Both numerical simulation data and a real SAR observation image in scenarios involving ocean internal waves (IW) are utilized for analyses. Experimental results suggest that the contribution of current-wave interaction to the sea surface Doppler velocity cannot be ignored for the IW ocean surface with rapidly varying currents. Under certain conditions, the relative errors of the OSC retrieval due to neglecting such a contribution could be larger than 30%.