The WindSat polarimetric microwave radiometer measures top-of-atmosphere brightness temperature, useful for retrieving surface wind vector over the ocean. This procedure was previously documented in low to moderate wind and light precipitation [1,2]. An atmospheric clearing algorithm designed to remove the emissive and absorptive effects of stronger precipitation and extract the emissivity of the wind-driven ocean surface worked well in moderate rain but had limited success with strong rainfall and high winds [3]. This paper presents results using an improved forward model including Mie scattering from rain. We consider three 2005 WindSat hurricane overpasses for proper atmospheric conditions (Dennis, Katrina and Rita). The improved atmospheric clearing algorithm extracts ocean surface emissivity in and near the hurricane rain bands and eyewall. The emissivity is compared to NOAA H*Wind analysis of the near-surface wind field. Results show a monotonic dependence of emissivity on wind speed up to category 3 hurricane-force winds.
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机译：Windsat Polarimetric微波辐射计测量了大气层的亮度温度，可用于检索海洋的表面风向量。此程序先前在低至中等风和光降水中记录了[1,2]。一种大气清算算法，旨在消除更强的降水量和提取风力海洋表面的发射率的发光和吸收效果，在中等雨中工作得很好，但在强大的降雨量和高风中取得了有限的成功[3]。本文介绍了使用从雨水散射的改进的前向模型的结果。我们认为2005年的Windsat飓风立交桥适当的大气条件（Dennis，Katrina和Rita）。改进的大气清算算法提取飓风雨段和眼罩附近的海洋表面发射率。将发射率与近表面风场的NOAA H *风分析进行比较。结果显示发射率对风速的单调依赖，达到3类飓风力风。
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