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.
[1]王致君. 偏振气象雷达的发展现状及其应用潜力[J]. 高原气象,2002,21(5):495-500.
[2]刘黎平,王致君,徐宝祥,等. 我国双线偏振雷达探测理论及应用研究[J]. 高原气象,1997,16(1):99-104.
[3]Bringi V N,Chandrasekar V. Polarimetric Doppler Weather Radar: Principles and Applications[M]. New York: Cambridge University Press,2001.
[4]曹俊武,刘黎平. 双线偏振雷达判别降水粒子类型技术及其检验[J]. 高原气象,2007,26(1):116-127.
[5]张廷龙,杨静,楚荣忠,等. 平凉一次雷暴云内的降水粒子分布及其电学特征的探讨[J]. 高原气象,2012,31(4):1091-1099.
[6]Straka,Jerry M,Dusan S Z,et al. Bulk hydrometeor classification and quantification using polarimetric radar data:synthesis of relations[J]. J Appl Meteor,2000, 39: 1341-1372.
[7]赵果,楚荣忠,张彤,等. 偏振多普勒雷达定量测量降雨精度的改进[J]. 高原气象,2011,30(2):498- 507.
[8]Brandes,Edward A,Guifu Zhang,et al. Experiments in rainfall estimation with a polarimetric radar in a subtropical environment[J]. J Appl Meteor,2002, 41: 674-685.
[9]Doviak R,Bringi V N,Ryzhkov A,et al. Considerations for polarimetric upgrades to operational WSR-88D radars[J]. J Atmos Ocean Technol,2000,17(3):257-278.
[10]梁海河,徐宝祥,刘黎平,等. CINRAD/SA雷达天线的辐射特性分析及其支持双线偏振升级的可行性研究[J]. 气象学报,2006,64(6):699-708.
[11]曹俊武,胡志群,陈晓辉,等. 影响双线偏振雷达相位探测精度的分析[J]. 高原气象,2011,30(3):817-822.
[12]肖艳姣,王斌,陈晓辉,等. 移动X波段双线偏振多普勒天气雷达差分相位数据质量控制[J]. 高原气象,2012,31(1):223-230.
[13]郭丽君,王振会,董慧杰,等. 旋转扁椭球水滴散射特性的快速算式研究[J]. 高原气象,2012,31(4):1081-1090.
[14]毕永恒,刘锦丽,段树,等. X波段双线偏振气象雷达反射率的衰减订正[J]. 大气科学,2012, 36(3):495-506.
[15]何宇翔,吕达仁,肖辉. X波段双线极化雷达差分反射率的衰减订正[J]. 高原气象,2009,28 (3): 607-616.
[16]马建立,苏德斌,金永利,等. X波段双线性偏振雷达电磁波衰减对冰雹识别的影响[J]. 高原气象,2012,31(3):825-835.
[17]苏德斌,孟庆春,沈永海,等. 双线偏振天气雷达天线性能要求及其检测方法[J]. 高原气象,2012,31(3):847-861.
[18]Wang Y,Chandrasekar V. Polarization isolation requirements for linear dual-polarization weather radar in simultaneous transmission mode of operation[J]. IEEE Trans Geosci Remote Sens,2006,44:2019-2028.