偏振雷达探测小椭球粒子群LDR的雷达气象方程

摘要

When the dual polarization radar detects the small spheroids,it transmits single polarized waves and receives the horizontal and vertical polarization.If the rotary axes of the particles are assumed in a certain orientation,the radar meteorological equations of Zvh and Zhv must be established firstly,and these corresponding radar reflectivity factors are redefined.This paper derives the equations of Zvh,Zhv and RLD_vh or RLD_hv.The changes of LDR are simulated when the small spheroids have the size distribution of Gamma and their rotary axes are uniformly oriented in space.%双线偏振雷达探测小椭球粒子群时,雷达单发双收或交替发射.在粒子旋转轴呈某一取向时,要获得定义为RLD_vh或RED_hv这个物理量,必须先建立Zvh及Zhv的雷达气象方程,并需重新定义相应的雷达反射率因子.本文推导出了能反演Zvh及Zhv的雷达气象方程,并模拟了具有Gamma谱分布的扁椭球粒子群在空间均匀取向时的LDR的变化情况.