Fast velocity estimation method for moving targets based on complex SAR image

摘要

Fast estimation of ship velocity remains a significant gap in ocean applications despite the increasing interest in space-borne synthetic aperture radar (SAR). This study proposed a fast velocity estimation method for moving targets based on complex SAR image. Here, the authors first applied several defocusing filters to the imagining results, estimating the along-track velocity of all moving targets by discerning the differences in the maximum of the filtered images. They then derived the cross-track velocity based on Doppler centroid drift. The results showed that the proposed method is effective in real TerraSAR-X dataset and is able to estimate velocity for moving targets in SAR complex image.