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Rain, wind, and backscatter: modeling rain effects on Ku-band ocean wind scatterometers

机译:雨,风和后向散射:在Ku波段海洋风散射仪上模拟降雨效果

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Spaceborne Ku-band ocean wind scatterometers (SeaWinds, NSCAT) enable frequent global coverage of meso-scale ocean surface winds. These instruments measure the normalized backscatter cross-section (/spl sigma//sub 0/) of the ocean's surface from multiple look directions and use this information to estimate ocean surface wind vectors. Although /spl sigma//sub 0/ is strongly related to surface winds, at Ku-band it is also impacted to varying degrees by rain. Arguably, the most important error source for Ku-band wind scatterometers is rain contamination. In order to calibrate out the effects of rain as much as possible, we must understand the impact of rain on the backscatter measurements which are used to retrieve wind vectors.
机译:星载Ku波段海洋风散射仪(SeaWinds,NSCAT)使中尺度海洋表面风的全球覆盖范围得以扩大。这些仪器从多个视线方向测量海洋表面的归一化反向散射横截面(/ spl sigma // sub 0 /),并使用此信息估计海洋表面的风向矢量。尽管/ spl sigma // sub 0 /与表面风强烈相关,但在Ku波段,雨水也会在不同程度上影响它。可以说,Ku波段风散射仪最重要的误差源是雨水污染。为了尽可能地校准雨水的影响,我们必须了解雨水对后向散射测量的影响,后向测量用于获取风向矢量。

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