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海洋通报  2011 

Vandemark-Chapron算法与Young算法联合反演Jason-1雷达高度计海面风速方法研究

DOI: 10.11840/j.issn.1001-6392.2011.6.014, PP. 679-682

Keywords: 高度计,风速反演,校准

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Abstract:

针对现行业务运行的雷达高度计风速反演算法只考虑0~20m/s的缺陷,提出了VC算法(Vandemark-ChapronAlgorithm)与Young算法联合反演高度计海面风速的方法,通过对Jason-1资料的统计试验,确定了后向散射截面临界点,当高度计后向散射截面大于等于该临界点时采用VC算法反演风速,反之采用Young算法反演风速,统计试验亦校准了Young算法因仪器参数不同而引起的观测偏差。选取了Jason-1高度计经过珊珊台风中心的一个个例进行试验。试验结果表明,单纯使用VC算法使得反演结果严重偏低,校准后的Young算法进行20~40m/s风速反演能够有效的提高反演精度。分析过程中进一步证实了利用Young算法反演20~40m/s风速的有效性。

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