利用Seasat SAR遙感圖象分析海浪的一種新方法
A NEW METHOD FOR MEASURING OCEAN WAVE FROM SEASAT SAR REMOTE SENSING IMAGE
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摘要: 本文提出一種從seasat合成孔徑雷達(dá)SAR遙感圖象中分析海浪波長(zhǎng)和方向的新方法。該方法首先對(duì)遙感圖象進(jìn)行定向取樣;然后進(jìn)行一維傅氏變換,求出海浪相關(guān)函數(shù);最后求出海浪波長(zhǎng)和方向。這種新方法的精度和運(yùn)算速度明顯優(yōu)于通常采用的二維傅氏變換分析法。
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關(guān)鍵詞:
- 海浪; 合成孔徑雷達(dá); 遙感圖象; 傅氏變換; Seasct
Abstract: A new method for measuring ocean wave length and direction from Seaset synthetic aperture radar (SAR) remote sensing image is presented in the paper. In the method, a ocean wave image is sampled in certain directions, the samples are then analyzed by using one dimensional Fourier transformation to calculate the ocean wave correlation function. At last the ocean wave length and direction are determined from the ocean wave correlation function. The method is better than the traditional two dimensional Fourier transformation method in both consuming time and precision. -
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