亚毫米波大气传输计算及分析  

THE CALCULATION AND ANALYSIS OF THE ATMOSPHERIC TRANSMISSION IN SUBMILLIMETER WAVE REGION

作　　者：唐义平[1] 李兴国[1] 李卫[2] 罗正发[2] 

机构地区：[1]南京理工大学光电学院 [2]昆明物理研究所

出　　处：《上海航天》1997年第1期13-20,共8页Aerospace Shanghai

摘　　要：主要研究了在近亚毫米波段的大气传输特性。通过分析远红外区和毫米波区的大气传输模型，给出了亚毫米波段的大气传输模型以及加权项的表达形式。在吸收模型的理论分析的基础上，推导了以宏观气象条件为参变量的解析表达式，并由实验数据对加权后的模型进行了验证分析。加权模型与实验数据基本吻合。在散射模型中，提出了以粒子的统计分布均值代替一般的密度分布，从而提高了计算精度。分别推导了Ｍｉｅ和Ｒａｙｌｅｉｇｈ散射系数求解的数学表达式。模拟计算结果与实验分析是一致的。由于空气中以气溶胶形式存在的粒子为多数，且粒子尺寸各异，对同一波长的散射表现不同。The specific property of atmospheric transmission at near submillimeter band is studied. The model of atmospheric transmission at submillimeter band and expression of weighting terms are given through the anlysis that of far infrared band and millimeter band. An analytic expression taking mocroscopic meteorological conditions as parameters is deduced under the basis of theortical analysis of absorption model. The weighted model is verified and analyzed with help of experimental data. The weighting model tallies with experimental data on the whole. The mathematic expressions resoluted by Mie and Rayleigh scattering coefficients respectively are deduced. The results of simulated calculation are identical with that of experimental analysis. The final effect should be shown by the form of statistical average

关 键 词：亚毫米波传播 大气传输 在气吸收 大气散射 

分 类 号：TN015[电子电信—物理电子学]