光学遥感探测尾流研究

本文对舰船航行产生尾流（伯努利水丘、表面波尾流、内波尾流、涡旋尾流）的生成机制进行探讨.研究了水中气泡上升的运动学规律和气泡群光散射特性.通过比较分析尾流在可见光、红外和微波等不同波段所表现的物理特征,并对可见光探测尾流、红外遥感探测尾流、合成孔径雷达探测尾流的发展进行探究,表明三种不同光学遥感探测尾流分别具有各自的优劣.研究合成孔径雷达（Synthetic Aperture Radar,SAR）图像检测算法表明,Radon变换检测算法能增强尾流图像,Hough变换检测算法能从尾流图像中提取目标的位置、航速、航向等参数.合成孔径雷达探测尾流具有高分辨率、快速实时、全天候等显著优势,是目前最适合探测尾流的光学遥感.

Study on Detection of Ship Wake Using Optical Remote Sensing

The formation mechanism of the Bernoulli hump,surface wave wake,internal wave wake,turbulent wake,vortex wake generated by moving submarines and ships is represented in the paper.Kinematic law of rising bubbles and their light scattering characteristics in water are studied.Superiority and limitation of the three different methods of optical remote sensing are concluded respectively,through comparing the physical properties of wakes under different wave range of visible light,infrared,and microwave,as well as investigating the development of ship wake detection in different electromagnetic spectrum.Study of algorithm of detecting ship wakes captured by synthetic aperture radar（SAR） shows that the Radon transform can strengthen the image.However,the wake coordinate information,such as speed,heading and other parameters can be extracted from the wake by the Hough transform.The synthetic aperture radar,with its significant advantages of high resolution,fast real-time,all-weather,is concluded the most effective optical remote sensing for detecting the wake of SAR image so far.