Then , after computing xpd induced by rain , its forecast model at different propagation distance is found . this paper also discusses the relation of reflectivity of rain with rainfall rate , taking different polarization wave into account , and that of fog with visibility 在研究了雨、霧介電特性的基礎(chǔ)上,計(jì)算了雨的去極化分辨率,得到了不同頻率、不同傳播距離的去極化分辨率預(yù)報(bào)模型;計(jì)算了不同極化狀態(tài)的波的反射率隨降雨率的變化規(guī)律。