摘要
根据Mie理论,利用4种常用雨滴谱分布,分析了激光信号在雨中的传输,得到了激光衰减随降雨率的变化关系.结果表明,单位体积内雨滴数量和雨滴尺寸分布对雨的衰减有很大的影响;M-P和广州雨滴尺寸分布适用于小雨范围;Joss的广布雨分布和广州雨滴尺寸分布适用于广延雨范围;由于雷暴雨发生的离散性较大,衰减偏差很大,M-P和广州雨滴尺寸分布适用于雨滴粒子数量较多的雷暴雨情况,Joss的雷暴雨分布和weibull分布适用于小粒子数相对较少的雷暴雨情况.
In this paper, on the base of Mie theory, four common raindrop size distribution are utilized, laser propagation through rain is analyzed, laser attenuation due to rain as a function of rainfall rate is obtained. The results show that amount of raindrop in per volume and raindrop size distribution have an important influence on attenuation caused by rain. The raindrop size distribution of M-P and Guangzhou are reasonable for drizzle, Joss and Guangzhou are reasonable for widespread. Because thunderstorm occurs dispersedly, the deviation of attenuation is large, M-P and Guangzhou are reasonable for thunderstorm that has more raindrop, Joss and Weibull are reasonable for thunderstorm that has less small raindrop.
出处
《淮阴师范学院学报（自然科学版）》
CAS
2009年第4期302-305,共4页
Journal of Huaiyin Teachers College;Natural Science Edition
基金
西安市科技局基金资助项目(YF07008)
关键词
激光传输
尺寸分布
MIE理论
衰减
laser propagation
size distribution
mie theory
attenuation
