双偏振雷达差分反射率定标故障分析  

Analysis of Differential reflectivity Calibration failure of dual-polarization Doppler weather radar

作　　者：桂亮 曾宪忠 蔡激扬[1] CUI Liang;ZENG Xianzhong;CAI Jiyang(The network and equipment support center of Hangzhou Meteorological Bureau,Hangzhou 310000,China)

机构地区：[1]杭州市气象局气象信息中心,浙江杭州310000

出　　处：《电声技术》2018年第1期61-64,共4页Audio Engineering

摘　　要：在双偏振天气雷达中,差分反射率标定ZDR为最重要的雷达系统参数,差分反射率定标故障,不仅降低定量测量降水的精度,也会对降水粒子的相态识别产生重大的偏差。根据C波段双偏振雷达的接收机的特点,论述了双偏振雷达与差分反射率定标相关的信号主通道流程,由于雷达系统无故障自动定位功能,技术人员根据雷达相关告警信息以及雷达自带的测试软件,依靠仪表测试,分步排查引起差分反射率异常的故障点,排查故障。In dual polarization weather radar,Differential reflectivity Calibration is the most important radar system parameters. Differential reflectivity Calibration failure can not only reduce the accuracy of quantitative precipitation measurement,but also lead to significant deviation of phase identification of precipitation particles. According to the characteristics of C band dual polarization radar receiver,The main channel process of dual polarization radar and differential reflectivity calibration is discussed. The radar system has no automatic fault location function,so according to radar related alarm information and radar test software,technicians,step by step investigate to cause differential reflectivity abnormal point of failure and troubleshoot,relying on instrument testing.

关 键 词：差分反射率定标 信号主通道流程 故障排查 

分 类 号：TN959.4[电子电信—信号与信息处理]