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首页> 外文期刊>Geoscience and Remote Sensing, IEEE Transactions on >On Detectability of a Ship's Kelvin Wake in Simulated SAR Images of Rough Sea Surface
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On Detectability of a Ship's Kelvin Wake in Simulated SAR Images of Rough Sea Surface

机译：粗糙海面SAR图像中船舶开尔文尾迹的可探测性

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摘要

Synthetic aperture radar (SAR) images of ship wakes frequently exhibit long streaks. Some of the streaks are attributed to the Kelvin V-wave wake, and others are attributed to the turbulent and bright narrow V-wake. Ocean waves reduce the detectability of Kelvin wakes in SAR images. The SAR imaging of Kelvin wakes of two ships with different dimensions moving in rough sea is studied theoretically. The Kelvin wakes are simulated using the Michell theory. The random sea surface is simulated using the Pierson–Moskowitz type wave spectrum. The elevations of the points of the water surface and their velocities and accelerations are considered as a superposition of a ship's coherent waves and wind waves. A two-scale composite model and the velocity-bunching integral are used to simulate the intensity of SAR images of a disturbed sea surface with an embedded Kelvin wake. The fast discrete Radon transform is applied to detect the boundaries of the simulated Kelvin wakes. The probabilities of missing detections (PMD) and false alarms (PFA) are estimated numerically. The influence of ships, wind, and SAR parameters on PMD and PFA is discussed. It is illustrated that PMD/PFA strongly depend on the sea state.
机译：船舶尾迹的合成孔径雷达（SAR）图像经常出现长条纹。一些条纹归因于开尔文V波尾流，另一些归因于湍流且明亮的窄V尾流。海浪降低了SAR图像中开尔文尾迹的可检测性。从理论上研究了两艘不同尺寸的船舶在波涛汹涌的海面开尔文尾流的SAR成像。开尔文尾波是使用密析尔理论模拟的。使用Pierson-Moskowitz型波谱模拟随机海面。水面点的高程及其速度和加速度被认为是船舶相干波和风波的叠加。使用两尺度复合模型和速度成束积分来模拟具有嵌入的开尔文尾波的受干扰海面的SAR图像强度。快速离散Radon变换用于检测模拟开尔文尾迹的边界。缺失检测（PMD）和错误警报（PFA）的概率通过数字估算。讨论了船舶，风和SAR参数对PMD和PFA的影响。说明了PMD / PFA强烈依赖于海况。

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