双线偏振雷达双通道一致性及测试方法研究

Dual Channel Consistency for Dual-Polarization Weather Radar and Its Measurement Method Research

从偏振天气雷达通道一致性的重要性出发,分析了雷达系统本身特性(天线、接收机、旋转铰链和馈线)对双通道一致性的影响。结合目前国内外偏振雷达所能达到的指标,提出了双通道一致性的测试内容和方法,并给出性能指标要求。根据上述方法,获得了北京市气象局C波段双线偏振天气雷达天线和双通道的测试结果,对如何提高双线偏振雷达的性能及评估性能好坏具有一定的参考意义。

Due to the engineering and technical reasons,it has not been a unified method and standard about how to test and evaluate dual-polarization weather radar's performance index. It is impossible that horizontal and vertical channel characteristics are completely consistent and isolation for dual-polarization radar. Based on the importance of channels consistency of dual polarization weather radar,the influence of dual channel consistency caused by the characteristics of radar system( antenna,receiver,rotating hinge and feeder) was analyzed. Combined with the index which current domestic and foreign polarization radar can achieve,the test contents and methods of dual-polarization weather radar was proposed and the requirement of the performance index was given. According to the above method,the test results of C band dual polarization weather radar in Beijing meteorological bureau were obtained which may have certain reference significance for improving and evaluating the performance of the dual-polarization radar.