多普勒天气雷达合成切变算法及改进方法的研究

魏耀; 张兴敢

doi:10.3724/SP.J.1146.2009.00011

多普勒天气雷达合成切变算法及改进方法的研究

doi: 10.3724/SP.J.1146.2009.00011

魏耀,
张兴敢

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出版历程
- 收稿日期: 2009-01-07
- 修回日期: 2009-09-18
- 刊出日期: 2010-01-19

Research and Improve on a Method of Radial Velocity Azimuth Composite Shear Using Doppler Weather Radar

摘要

摘要: 该文在研究由多普勒天气雷达速度场计算合成切变所采用的直接计算差值滤波算法的基础上，针对其存在的边缘点的切变识别较少等问题，结合最小二乘法在线性拟合方面的优势以及雷达数据沿径向分布的特点，提出一种基于取不同拟合窗口的最小二乘法的算法，并利用计算定位精度等方法比较和分析这两种算法，最小二乘法算法在定位精度、识别能力、边缘切变识别等方面优于直接计算差值滤波算法。在2008年北京奥运气象保障中应用最小二乘法的合成切变气象产品给人工影响天气提供了重要参考资料。
- 天气雷达; 合成切变; 最小二乘法; 拟合窗口; 人工影响天气
Abstract: Based on the research of a differential filtering method retrieving composite shear from Doppler radar velocity data, considering the problems of this method, such as the number of edge detection points is too small, combined with the least squares advantage on Linear fitting and radar datas radial distribution character, this paper presents a method of least squares based on different fitting window. These two methods are compared and analyzed by using computing positioning accuracy method and so on. The method of least squares is better than the differential filtering method on positioning accuracy, identification ability, edge detection and so on. During the 2008 Beijing Olympic Games, by using the method of least squares, the radial velocity azimuth composite shear weather product provides some important information for the weather modification.

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[1] 胡明宝. 天气雷达探测与应用[M]. 北京: 气象出版社, 2007:256-262.Hu Ming-bao. Detection and Application of WeatherRadar[M]. Beijing: China Meteorological Press, 2007: 256-262. [2] 俞小鼎, 姚秀萍, 熊廷南, 等. 多普勒天气雷达原理与业务应用[M]. 北京: 气象出版社, 2006, 1: 82-86.Yu Xiao-ding, Yao Xiu-ping, and Xiong Ting-nan, et al..Principle and Application of Doppler Weather Radar[M].Beijing: China Meteorological Press, 2006, 1: 82-86. [3] 张永军, 李彩萍. 合成孔径雷达模糊度分析[J].电子与信息学报.2004, 26(9):1455-1460浏览 [4] Harris F I, Glover K M, and Smythe G R. Gust frontdetection and prediction[C]. Preprints 14th conference onSevere Local Storms, Bulletin of the American MeteorologicalSociety, Boston, 1985: 342-345. [5] 王珊珊. 多普勒天气雷达合成切变模块设计[J]. 科技信息,2007, 18: 82-83.Wang Shan-Shan. Module design of doppler weather radar'sradial velocity azimuth composite shear [J]. Science Technology Information, 2007, 18: 82-83. [6] 胡志群, 夏文梅, 汤达章等. 多普勒雷达速度图像识别及散度提取方法研究[J]. 高原气象, 2007, 26(4): 821-828.Hu Zhi-qun, Xia Wen-mei, and Tang Da-zhang, et al.. Astudy on doppler radar velocity pattern recognition techniqueand divergence extraction approach[J]. Plateau Meteorology,2007, 26(4): 821-828. [7] Haykin S. Adaptive Filter Theory [M]. Beijing: PublishingHouse of Electronics Industry, 2006: 303-339. [8] 王艳兰, 汤达章, 唐伍斌等. 多普勒雷达径向散度与强对流回波变化特征分析[J]. 热带气象学报, 2007, 23(6): 659-663.Wang Yan-lan, Tang Da-zhang, and Tang Wu-bin, et al..Doppler radar character analysis on radial divergence andecho change of strong convective[J]. Journal of TropicalMeteorology, 2007, 23(6): 659-663.

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