CINRAD/SA-D雷达差分反射率金属球标定试验  

Metal Sphere Calibration for Z Parameters of CINRAD/SA-D Radar

作　　者：朱毅 周红根 赵宇 刘俊[3] 杜云东 储晨曦 王新 ZHU Yi;ZHOU Honggen;ZHAO Yu;LIU Jun;DU Yundong;CHU Chenxi;WANG Xin(Jiangsu Meteorological Observation Center,Nanjing 210009;Xuzhou Meteorological Service,Jiangsu,Xuzhou 221006;Taizhou Meteorological Service,Jiangsu,Taizhou 222008;Beijing Metstar Radar Co.Ltd.,Beijing 100086;Chongqing Meteorological Service,Chongqing 400703)

机构地区：[1]江苏省气象探测中心,南京210009 [2]徐州市气象局,徐州221006 [3]泰州市气象局,泰州222008 [4]北京敏视达雷达有限公司,北京100086 [5]重庆市气象局,重庆400703

出　　处：《气象科技》2021年第4期517-523,534,共8页Meteorological Science and Technology

基　　金：国家重点研发计划(2018YFC1506100、2018YFC1506102);江苏省气象局科研基金项目(KZ201905)共同资助。

摘　　要：目前我国新一代天气雷达正升级为双偏振体制,CINRAD/SA-D双偏振天气雷达对气象目标差分反射率(ZDR)的精确测量是参数标定的重要环节。对徐州双偏振雷达配置VCP-sect扫描模式,采用目标方位±5°的扇扫组合,且关闭地物等所有雷达滤波算法,用无人机分别携带2种标准金属球开展ZDR标定试验。分析试验结果,发现采用40cm金属球,控制无人机与金属球间隔为68m时,ZDR平均值为-0.265dB,最小为-0.125dB,最大为-0.375dB,满足雷达定标ZDR的技术要求。研究结果为业务雷达开展双偏振雷达定标ZDR提供了技术方案。At present,the next generation weather radar in China is upgrading to the dual polarization system.The accurate measurement of differential reflectivity(ZDR)of meteorological targets by the CINRAD/SA-D dual polarization weather radar is an important part of parameter calibration.For Xuzhou dual polarization radar,ZDR calibration test for Xuzhou radar was carried out with UAV(Unmanned Aerial Vehicle)carrying two kinds of standard metal spheres,respectively.In this test,the VCP-sect scanning mode was configured,the fan scanning combination of target azimuth ±5° was adopted and all radar filtering algorithms such as ground objects were turned off.The results show that the average value of ZDR was 0.265 dB,the minimum was-0.125 dB and the maximum was-0.375 dB,when the 40 cm metal sphere was used,and the distance between UAV and metal sphere was 68 m.The values of ZDR meet the technical requirements of radar ZDR calibration.The research provides a technical solution for operational radar to carry out dual polarization radar ZDR calibration.

关 键 词：标定 双偏振雷达 ZDR 金属球 无人机 

分 类 号：P415.2[天文地球—大气科学及气象学] TP75[自动化与计算机技术—检测技术与自动化装置]