Doppler Centroid Estimation for Ocean Surface Current Retrieval from Sentinel-1 SAR Data

Correlation doppler estimation (CDE), and energy balancing (EB) based DC approaches are implemented in this paper. A 2-D sliding window is deployed to estimate DC with small blocks of data while covering the whole scene so that all parts of the scene are potentially represented. We find the results of DC estimates are confined to primitive baseband (±PRF⁄2). Moreover, the corresponding retrieved ocean surface current component is reasonable, particularly values vary within the limit of error bounds. Finally, the parameters of ocean surface current are compared with ocean wave models reported in the literature. Mid-term analysis, faster and efficient simulations show that the implemented algorithm is a good fit for Sentinel-1 SAR data.