多视SAR图像交叉谱虚部反演海浪信息

Ocean Wave Information Extraction by Multilook SAR Processing

提出利用多视处理子视图交叉谱虚部反演海浪信息的方法。子视图中心频率差分别为400Hz,600Hz和800Hz。所用四幅SAR图像均由JERS-1不同时间采集的。地点为东京附近海域,并有对应的测量所得海浪信息,包括波向、波高和周期。反演结果表明,中心频率差为400Hz的处理方法所得结果精度最高,对应的波向和周期信息都与实测数据相差无几。

This paper presents the approach of ocean wave information extraction using the imaginary part of cross spectrum of multilook SAR processed sub-looks. The center frequency difference between look 3 and look 1 are 400Hz, 600Hz and 800Hz respectively. Four JERS-1 SAR images observed over Tokyo area, and the ground truth data are employed to invert the ocean wave information including propagation direction, wave height and period. Inversion shows the validity of our inversion approach, especially at the center frequency difference 400 Hz.