Enhancement Processing of High-Resolution Spaceborne SAR Wake Based on Equivalent Multi-Channel Technology
Source abstract
Abstract
Ship wake detection plays a crucial role in compensating for target detection failures caused by defocusing or displacement in SAR images due to vessel motion. This study addresses the challenge of enhancing wake features in high-resolution spaceborne SAR by exploiting the distinct linear characteristics of wake echoes and the random motion of ocean background clutter. We propose a novel method based on sub-aperture image sequences, which integrates equivalent multi-channel technology to fuse wake and wave information. This approach significantly improves the quality of raw wake images by enhancing linear features and suppressing background noise. The Radon transform is then applied to evaluate the enhanced wake images. Through a combination of principle analysis, enhancement processing, and both subjective and objective evaluations, we conducted experiments using real data from the AS01 SAR satellite and compared our method with traditional wake enhancement techniques. The results demonstrate that our method achieves significant wake enhancement and improves the recognition of detail wake features.
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Research context
OpenAlex topics: Advanced SAR Imaging Techniques · Synthetic Aperture Radar (SAR) Applications and Techniques · Radar Systems and Signal Processing
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Joint Laboratory of Radar Satellite and Applied Technology Between Beihang University and Beijing Skysight Technology Co., Ltd., Beijing 100101, China
School of Economics and Management, Beihang University, Beijing 100191, China
School of Aerospace Engineering, Tsinghua University, Beijing 100190, China
School of Electronic and Information Engineering, Beihang University, Beijing 100191, China
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