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为更好地利用合成孔径雷达SAR图像本身的风条纹信息来反演高精度的海面风向,采用不同模式、不同极化方式的星载ASAR图像,基于抽样小波变换结合快速傅里叶变换的方法反演海面风向,同时将该方法反演的结果与传统的傅里叶变换法和改进的局部梯度法反演的结果进行了对比。结果表明,抽样小波变换应用于海面风向的反演是可行的,反演的风向精度优于传统的傅里叶变换法和改进的局部梯度法。ASAR不同模式、不同极化方式的数据反演结果存在着一定的差异。
In order to make better use of the wind stripe information of the SAR image itself to retrieve the high-precision wind direction of the sea surface, the ASAR images with different modes and different polarizations are used. Based on the sampling wavelet transform combined with Fast Fourier Transform Inversion of the sea surface wind direction, at the same time the results of the inversion method compared with the traditional Fourier transform method and the improved local gradient inversion results were compared. The results show that it is feasible to apply the sampling wavelet transform to the inversion of the sea surface wind direction, and the wind direction accuracy of the inversion is better than the traditional Fourier transform and the improved local gradient method. There are some differences in the data inversion results of different ASAR modes and polarizations.