基于虚拟仪器的双偏振天气雷达通道一致性研究  

Research about channel consistency of dual polarization weather radar base on virtual instrument

作　　者：梁莺[1] 李效东[1] 刘光普[1] 任雍[1] Liang Ying;Li Xiaodong;Liu Guangpu;Ren Yong(Atmospheric Sounding and Technical Support Centre of Fujian Province,Fuzhou 350008,China)

机构地区：[1]福建省大气探测技术保障中心

出　　处：《国外电子测量技术》2019年第6期110-114,共5页Foreign Electronic Measurement Technology

摘　　要：双偏振天气雷达水平和垂直通道信号的性能指标影响雷达探测数据的准确性,为了分析双偏振天气雷达通道的一致性,利用虚拟仪器技术开展双偏振天气雷达水平和垂直通道信号一致性测试的研究。通过研究发现雷达水平和垂直通道的差分反射率、差分传播相位和驻波比等参数存在一定的差异:对于差分反射率,订正后的水平和垂直通道的偏差小于0.1dB;对于差分传播相位,由于两个通道的传输路径不同,造成信号在垂直通道比水平通道有一定的相位延迟;对于驻波比,同一仰角不同方位角的通道驻波比有不同的变化趋势和变化范围。因此,开展双偏振天气雷达通道一致性研究,对于提高双偏振天气雷达探测的准确度以及降低雷达故障率有一定的参考价值。The performance indicators of the horizontal and vertical channel signals have a great influence on the accuracy of the dual polarization weather radar detection data.In order to analyze the channel consistency of dual polarization weather radar,this paper uses virtual instrument technology to carry out the research.It is found that the parameters of differential reflectivity,differential phase and standing wave ratio are different through research.For differential reflectance,the corrected horizontal and vertical channel deviation is less than 0.1 dB.For the differential phase,the signal has different transmission paths in the two channels,causing a certain phase delay in the vertical channel compared with the horizontal channel.The voltage standing wave ratios of the two channels have different trends and ranges of variation at the same elevation angle and different azimuths.So,ithas certain reference value for improving the accuracy and reducing the failure rate of dualpolarization weather radar detection according this research.

关 键 词：虚拟仪器 双偏振天气雷达 差分反射率 差分传播相位 驻波比 

分 类 号：TN957[电子电信—信号与信息处理]