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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >A new wind vector algorithm for C-band SAR
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A new wind vector algorithm for C-band SAR

机译:一种新的C波段SAR风矢量算法

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摘要

Ocean wind speed and wind direction are estimated simultaneously using the normalized radar cross sections /spl sigma//sup 0/ corresponding to two neighboring (25-km) blocks, within a given synthetic aperture radar (SAR) image, having slightly different incidence angles. This method is motivated by the methodology used for scatterometer data. The wind direction ambiguity is removed by using the direction closest to that given by a buoy or some other source of information. We demonstrate this method with 11 ENVISAT Advanced SAR sensor images of the Gulf of Mexico and coastal waters of the North Atlantic. Estimated wind vectors are compared with wind measurements from buoys and scatterometer data. We show that this method can surpass other methods in some cases, even those with insufficient visible wind-induced streaks in the SAR images, to extract wind vectors.
机译:在给定的合成孔径雷达(SAR)图像中,使用与两个相邻(25 km)块相对应的归一化雷达横截面/ spl sigma // sup 0 /同时估计海洋风速和风向,其入射角略有不同。该方法是由用于散射仪数据的方法所激发的。通过使用最接近浮标或其他信息源的风向,可以消除风向的歧义。我们用墨西哥湾和北大西洋沿岸水域的11个ENVISAT Advanced SAR传感器图像演示了此方法。将估计的风向矢量与来自浮标和散射仪数据的风向测量值进行比较。我们表明,在某些情况下,即使是在SAR图像中可见风诱导条纹不足的情况下,该方法也可以超越其他方法来提取风矢量。

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