低于1000GHz电磁波的大气复折射率  

THE ATMOSPHERIC COMPLEX REFRACTIVE INDEX AT FREQUENCY UP TO 1000 GHz

作　　者：胡大璋[1] 周兆先[1] 

机构地区：[1]中国电波传播研究所青岛研究中心

出　　处：《红外与毫米波学报》1994年第4期278-284,共7页Journal of Infrared and Millimeter Waves

基　　金：电子科学基金

摘　　要：根据气体吸收理论和我国气象探空数据Ｐ－Ｔ－Ｕ剖面（即压强－温度－露点差剖面），给出了频率直到１００ＧＨｚ，低层大气复折射率在我国１０４个气象站的频率、时间和空间特性的计算结果．讨论了在５０～７０ＧＨｚ频率范围内，氧气吸收的压力展宽效应．根据无线电工程的需要，还对气体吸收产生的衰减和时延进行了计算．Based on the theory of gaseous absorption and radiosonde data of P T-U profile (i.c., pressure temperature-dewpoint profile) at 104 stations in China, the calculated results of the frequency-time-space characteristic of complex refractive index due to the gaseous absorption at frequencies up to 1000 GHz in fourer atmosphere are given. The pressure broadened effect of gaseous absorption by oxygen at frequencies 50￣70GHz is discussed. Attenuation and delay due to gaseous absorption are calculated according to the requirement of radio engineering.

关 键 词：大气吸收 复折射率 电磁波 极离频 

分 类 号：TN011[电子电信—物理电子学]