椭球雨滴群旋转轴取向对双线偏振多普勒雷达参量影响的计算分析  

Effects of Axial Orientations of Rotating Spheroidal Raindrops on Polarimetric Measurements of Dual-Polarization Radar

作　　者：杨通晓[1,2] 王振会[1,2] 张培昌[2] 胡方超[2] 

机构地区：[1]南京信息工程大学KLME,江苏南京210044 [2]南京信息工程大学大气物理学院,江苏南京210044

出　　处：《高原气象》2009年第5期997-1005,共9页Plateau Meteorology

基　　金：教育部高等学校博士学科点专项科研基金项目(20060300002);国家自然科学基金项目(40875016)共同资助

摘　　要：以椭球粒子的电磁波散射理论为基础,主要研究椭球雨滴群旋转轴在空间的取向特征,建立粒子旋转轴空间取向与风场、雷达天线仰角间的关系。在考虑粒子传输效应的情况下,分析了旋转轴取向对双线偏振雷达探测参数ZDR和LDR的影响,为提高双线偏振多普勒天气雷达观测资料的精度提供了理论依据。Based on the theory of electromagnetic scattering by small rotating spheroid particles,studies are made of axial orientation features of small rotating spheroid raindrop groups so as to establish the relationship between axial orientations of the raindrop groups and wind direction,elevation of the radar antenna.Considering the propagation effects in rainfall,here has analyzed the effect of axial orientation on dual-polarization radar measurements,such as ZDR and LDR.The results provide a theoretical base fo...

关 键 词：双线偏振雷达 雷达仰角 偏振参量 

分 类 号：P412.25[天文地球—大气科学及气象学]