低层大气折射对下视雷达临界俯角的影响  

The influence of critical angle on down looking radar by lower atmospheric refraction

作　　者：吴希德[1] 罗贤云[1] 康士峰[1] 

机构地区：[1]中国电波传播研究所,河南新乡453003

出　　处：《电波科学学报》2000年第4期459-461,共3页Chinese Journal of Radio Science

摘　　要：下视雷达的射线路径与临界视在俯角有关 ,而临界视在俯角又与低层大气折射剖面有关。文中利用实测低层大气折射指数剖面与全国平均大气模型对下视雷达的临界俯角与高度的关系进行分析 ,并利用实测地面大气折射率通过指数大气模型对下视雷达的临界视在俯角进行预测 ,同时也给出预测精度。The path of radio bears relation to the critical depression angle on down looking radar, which bears relation to the atmospheric profile lower atmospheric refraction. The relationship between the critical depression angle of down looking radar and refractive profiles of atmosphere was analyzed by using experimental profiles and national average model of atmosphere. The critical depression angle is predicted with the exponential refractive model of atmosphere and refractivity measured. Just above the ground and the accuracy is also shown.

关 键 词：临界俯角 大气剖面 大气折射 下视雷达 

分 类 号：TN95[电子电信—信号与信息处理] TN011.3[电子电信—信息与通信工程]