重庆双偏振天气雷达(CINRAD/SAD)径向干扰去除及补偿算法研究  

Research on radial interference removal and compensation algorithm of CINRAD/SAD in Chongqing

作　　者：刘昉 叶华芳 李奇临 梁传彬 刘湘 严桂珍 张俊 LIU Fang;YE Huafang;LI Qilin;LIANG Chuanbin;LIU Xiang;YAN Guizhen;ZHANG Jun(Chongqing Meteorological Information and Technology Support Center,Key Laboratory of Economic Transformation of Climate Resources,China Meteorological Administration,Chongqing 401147,China;ChongqingYongchuan District Meteorological Bureau,Chongqing 402160,China;Chongqing Hechuan District Meteorological Bureau,Chongqing 401520,China)

机构地区：[1]中国气象局气候资源经济转化重点开放实验室重庆市气象信息与技术保障中心,重庆401147 [2]重庆市永川区气象局,重庆402160 [3]重庆市合川区气象局,重庆401520

出　　处：《现代电子技术》2023年第9期115-119,共5页Modern Electronics Technique

基　　金：重庆市气象两江英才项目(YWJSGG-202108)。

摘　　要：重庆新一代天气雷达升级为双偏振系统后,对重庆市重要天气过程的短临预报以及预警提供了更有效的数据。雷达运行中,偶尔会遇到外部电磁干扰,表现为在某几个仰角的一个或多个方位上径向射线,在业务应用中需要及时发现、去除并补偿。文中基于改进K-means++算法结合相关偏振量的判定,来实现径向干扰的识别;采用三线性插值与改进双线性插值相结合的数据插值补偿算法对剔除后的回波进行填补,最大限度地接近真实回波。通过仿真实验验证了算法的有效性。After Chongqing′s CINRAD was upgraded and became a dual polarization radar system(CINRAD/SAD),more effective data are provided for short⁃term temporary forecasting and early warning of important weather processes in Chongqing city.During operation of theradar system,it occasionally encounters external electromagnetic interference,which manifests as radial rays in one or more directions at certain elevation angles and needs to be detected,removed and compensated in time in business applications.In this paper,based on the improved K⁃means++algorithm combined with the determination of the correlation polarization amount,the identification of radial interference is realized.The data interpolation compensation algorithm combined with trilinear interpolation and improved bilinear interpolation is used to fill the rejected echo and make it maximize the proximity to the real echo.The effectiveness of the algorithm has been verified by simulation.

关 键 词：双偏振天气雷达 径向干扰 补偿算法 预警数据 电磁干扰 回波补偿 

分 类 号：TN956-34[电子电信—信号与信息处理]