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气象:2011,37(2):203-212
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二维多途径退速度模糊算法的应用及效果研究
(1.中国气象科学研究院灾害天气国家重点实验室, 北京 100081;2. 北京市气象局, 北京 100089;3.中国气象科学研究院灾害天气国家重点实验室, 北京 100081;4.北京市气象局, 北京 100089;5.河北农业大学理学院数学系, 保定 071001)
The Application of an Automated 2 D Multi Pass Doppler Radar Velocity Dealiasing and the Research of Its Effect
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投稿时间:2009-12-25    修订日期:2010-04-12
中文摘要: 径向速度的模糊问题是制约新一代天气雷达径向速度资料应用的关键问题。本文将美国强风暴实验室Zhang Jian提出的二维多途径退速度模糊方法应用到我国新一代天气雷达(SA、CB)观测的台风以及强对流风暴天气过程的资料质量控制中,进行了退模糊试验,详细分析了新算法的特点,并提出了数据预处理的方法。个例资料的分析表明:该算法不仅能处理连续性风场的速度模糊,也能处理存在大量数据缺失以及距离折叠的不连续性风场的径向速度模糊,但对于孤立回波的速度模糊的处理,也会出现问题。同时,在个例研究中发现,地物回波对于退速度模糊效果也有一定的影响。
Abstract:An operational challenge in using Doppler radar velocity field is that velocity measurements are often aliased. The experiments of velocity dealiasing are developed by introducing an Automated 2 D Multi Pass Doppler Radar Velocity Dealiasing Scheme from Zhang Jian (NSSL in USA) into typhoon data and severe convective storm data from Doppler radar (SA and CB) in China. This paper analyzed the characteristics of the new algorithm in detail, and proposed the schemes of data preprocessing. The results showed that the new algorithm from Zhang Jian could not only perform continuous velocity fields, but also possess improvements in regions near data voids and range folded observations. However, it has also disadvantages for isolated echo. At the same time, it is found that AP (anomalous propagation) clutters may affect the effect of the dealiasing. 
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基金项目:公益性行业(气象)科研专项“热带西太平洋观测试验与我国高影响天气可预报性研究”和“面向业务数值预报的重点资料关键应用技术研究”共同资助
引用文本:
仰美霖,刘黎平,苏德斌,徐文君,2011.二维多途径退速度模糊算法的应用及效果研究[J].气象,37(2):203-212.
YANG Meilin,LIU Liping,SU Debin,XU Wenjun,2011.The Application of an Automated 2 D Multi Pass Doppler Radar Velocity Dealiasing and the Research of Its Effect[J].Meteor Mon,37(2):203-212.