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首页> 外文期刊>IEEE Aerospace and Electronic Systems Magazine >Radar characterization of ship wake signatures and ambient ocean clutter features
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Radar characterization of ship wake signatures and ambient ocean clutter features

机译：雷达雷达的船舶尾迹特征和周围海洋杂波特征

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摘要

Characteristics of ship wakes and ambient ocean features in synthetic-aperture radar (SAR) and coherent real-aperture radar (RAR) images are studied, and two algorithms are evaluated to assess the value of using wakes for detecting and classifying ships. Empirical models of SAR ship-wake signatures, derived from measurements of wakes in L-band SAR images from SIR-B, are incorporated in the detection algorithms. To further study wake and ambient characteristics, data from a land-based X-band coherent RAR (which overlooks the ocean) are processed to obtain ocean surface Doppler velocities as a function of range and time. Line-of-sight orbital currents of ocean waves are easily detected, and the power in the velocity-field spectrum is concentrated on the dispersion curve for free-surface gravity waves. Cuts taken along this curve produce quantitative wave spectra for the study of ocean surface features and ship-induced wake modifications of the surface.
机译：研究了合成孔径雷达（SAR）和相干真实孔径雷达（RAR）图像中船舶尾迹的特征和周围海洋特征，并评估了两种算法来评估使用尾迹进行船舶检测和分类的价值。从SIR-B的L波段SAR图像中的尾迹测量得出的SAR船舶尾迹特征的经验模型已纳入检测算法。为了进一步研究尾流和周围环境特征，对来自陆基X波段相干RAR（俯瞰海洋）的数据进行处理，以获得海浪多普勒速度随距离和时间的变化。很容易检测到海浪的视线轨道流，并且速度场谱中的功率集中在自由表面重力波的色散曲线上。沿着这条曲线进行的切割会产生定量的波谱，用于研究海洋表面特征和船舶引起的表面唤醒变化。

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