摘要
为了订正X波段天气雷达干扰回波,文章收集并选出X波段天气雷达的异常数据,分析发现电磁干扰回波主要以点状的螺旋带、条幅状麻点和直线两种形式出现。传统电磁干扰滤波采用的单窗口阈值法,在消除干扰回波的同时会因误判而滤除真实气象回波边缘。文章采用构造特征参量并判断各方位径向阈值后赋予标记值,对不同标记值径向实行相应质控方法,最后运用多方位矩形窗口判断孤立点回波,从多角度检查单距离库和周围回波的相对关系,有效减少对气象回波边缘的误判。批量处理非气象回波数据后发现,增加了特征参量的识别算法对径向干扰回波的识别效果较好。
In order to correct the interference echoes of X-band weather radar,this article collected and selected abnormal data of X-band weather radar.Analysis found that electromagnetic interference echoes mainly appear in two forms:point shaped spiral bands,strip shaped pockmarks,and straight lines.The traditional electromagnetic interference filtering method uses a single window threshold method,which eliminates interference echoes while filtering out the true meteorological echo edges due to misjudgment.This article constructs feature parameters and determines the radial threshold in each direction,assigns flag values,and implements corresponding quality control methods for different flag values radially.Finally,a multi-directional rectangular window is used to judge isolated point echoes,and the relative relationship between the single distance library and surrounding echoes is checked from multiple angles,effectively reducing misjudgment of meteorological echo edges.After batch processing non meteorological echo data,it is found that the recognition algorithm with added feature parameters has a better recognition effect on radial interference echoes.
作者
周先锋
徐嘉
何越
张广元
Zhou Xianfeng;Xu Jia;He Yue;Zhang Guangyuan(Atmospheric Observation Center of Anhui,Hefei 230031;Atmospheric Observation Center of Shanxi,Xi'an 710014)
出处
《气象水文海洋仪器》
2024年第4期1-4,共4页
Meteorological,Hydrological and Marine Instruments
基金
安徽省气象局创新发展专项(CXM202210)
安徽省气象局自主创新发展专项(AHQXZC202210)
安徽省自然科学基金资助项目(2208085UQ05)资助。
关键词
X波段雷达
电磁干扰
特征量
X-band weather radar
electromagnetic interference
feature parameters
