T矩阵散射模拟双偏振测雨雷达偏振及衰减特性

Simulation of Polarization Characteristics and Attenuation of Dual-polarization Rain-measuring Radar with T-matrix Methods

通过T矩阵散射模拟,研究X、C和S波段双偏振测雨雷达在单分散雨滴谱、不同雨强和不同最大雨滴直径下的偏振和雨区衰减特性,分别建立三种不同波段双偏振雷达反射率因子和差分反射率的雨区衰减订正关系.最后,用实测雨滴谱数据和X波段双偏振雷达实测反射率数据验证散射模拟结果的准确性.

We investigate polarization and attenuation characteristics of X,C and S bands of dual-polarization radars with monodisperse raindrops of equivalent spherical diameter,different rainfall intensities and different maximum raindrops diameters using by T-matrix scattering simulation.Attenuation correction relation of radar reflectivity and differential reflectivity is established for the three bands of dual-polarization radars in medium of rain.Finally,accuracy of the scattering simulation results is verified by measured raindrop spectrum data and measured reflectivity data of X-band dual-polarization radar.