清远连州CINRAD/SA-D型业务试验双偏振天气雷达技术评估

以北京敏视达雷达有限公司生产的国内首部S波段业务试验双偏振雷达（清远连州CINRAD/SA-D型）为研究对象，从硬件升级、在线/离线标定方法、信号处理及软件技术等方面与美国WSR-88D双偏振天气雷达进行比对分析，重点对采用机内信号源法的长期标定结果和小雨数据全链路标定结果进行统计分析.研究结果表明:机内长期标定情况下，差分反射率因子ZDR和差分传播相位φDP的统计方差分别为0.205 3 dB和1.135 8°；通过关键参数筛选出的业务观测小雨数据，ZDR的标准差值控制在了0.5 dB以内，这些结果与美国天气雷达标定指标相当. 

The Technology Evaluation of S-Band Business Test Dual Polarization Radar(CINRAD/SA-D)

Taking the domestic first S-band business test dual polarization radar (CINRAD/SA-D) produced from Beijing Metstar Company as a study object, a comparison analysis was carried out with WSR-88D dual polarization radar from the aspects, including hardware upgrade, online/offline calibration method, signal processing and software technology. And the long-term calibration with internal signal source method and the results of the whole link calibration with light rain method were analyzed. The results show that the statistical variance of the differential reflectivity factor ZDR and the differential propagation phase DP with signal source method are 0.205 3 dB and 1.135 8°, respectively. The standard deviation of the ZDR can be controlled within 0.5 dB with light rain data selected from the key parameters. These results are comparable to WSR-88D weather radar. This work has a very important significance to guide the domestic dual polarization radar upgrade.