| 基于双线偏振多普勒雷达识别地物回波 |
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| 引用本文： | 曹杨,苏德斌,周筠珺,徐文静.基于双线偏振多普勒雷达识别地物回波[J].成都信息工程学院学报,2014,29(5):509-516. |
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| 作者姓名： | 曹杨 苏德斌 周筠珺 徐文静 |
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| 作者单位： | 1. 成都信息工程学院大气科学学院,四川成都,610225
2. 北京市气象局,北京,100089 |
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| 基金项目： | 国家自然科学基金资助项目，感谢北京市气象局气象科技研发专项资助项目(2013BMBKYZX04)对本文的资助 |
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| 摘 要： | 地物回波的存在严重影响雷达数据质量,从而影响定量降水估测精度。双线偏振多普勒天气雷达在识别地物回波方面具有明显优势。分析了北京市气象局C波段双线偏振多普勒天气雷达探测到的降水回波和地物回波的特征,在刘黎平的模糊逻辑算法基础上选择容易区分降水回波和地物回波的特征量,加入偏振参数构成偏振模糊逻辑算法。利用2012年的"7.21特大暴雨"个例对识别效果进行分析,并与常规模糊逻辑算法识别效果对比。结果表明,加入偏振参数的模糊逻辑算法能有效识别地物回波,对地物回波识别效果有明显改善,并有效解决了过度识别零速度降水区的问题。
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| 关 键 词： | 双线偏振多普勒天气雷达 地物回波 模糊逻辑 质量控制 |
Identification of Ground Clutter Using Dual-polarimetric Doppler Weather Radar |
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| CAO Yang,SU De-bin,ZHOU Yun-jun,XU Wen-jing.Identification of Ground Clutter Using Dual-polarimetric Doppler Weather Radar[J].Journal of Chengdu University of Information Technology,2014,29(5):509-516. |
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| Authors: | CAO Yang SU De-bin ZHOU Yun-jun XU Wen-jing |
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| Institution: | CAO Yang,SU De-bin,ZHOU Yun-jun,XU Wen-jing( 1.College of Atmosphersc Science, Chengdu University of Information Technology, Chengdu 610225, China; 2.Beijing Meteorological Bureau, Beijing 100089,China) |
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| Abstract: | The radar data is affected by ground clutter and further impact on the quantitative precipitation estimation accuracy.The dual polarimetric Doppler weather radar have an advantage in identification of ground clutter.This paper analyses the characteristic of precipitation and ground clutter echoes observed by C-band dual polarimetric Doppler weather radar which is built in Beijing Meteorological Bureau（BMB）.chooseing the conventional feature parameters which are easy to distinguish between precipitation echoes and ground clutter echoes in the fuzzy logic algorithm of Liu Liping,and with the polarization parameters we proposed a new algorithm to identify ground clutter echoes.The detection results are analyzed by using the radar data for ＂7.21 Extraordinary Rainstorm＂ case in 2012,and compared with the results of fuzzy logic algorithm of Liu Liping.The results indicate that the new algorithm with polarization parameters can effectively indentify ground clutter echoes,and effectively solve the problem of excessive recognition of zero speed precipitation area. |
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| Keywords: | dual-polarimetric Doppler weather radar ground clutter fuzzy logic quality control |
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