山基GPS掩星观测实验及其反演原理  

Mountain-based GPS observations of occultation and its inversion theory

作　　者：胡雄[1] 张训械[1] 吴小成[1] 肖存英[1] 曾桢 宫晓艳[1] 

机构地区：[1]中国科学院空间科学与应用研究中心,北京100080 [2]University Corporation for Atmospheric Research,Colorado,USA

出　　处：《地球物理学报》2006年第1期22-27,共6页Chinese Journal of Geophysics

基　　金：国家自然科学基金项目(40204011);中国科学院知识创新工程重要方向项目(KJCX2-SW-T1)资助.

摘　　要：分别在湖北省药姑山和九宫山的山头上开展GPS掩星观测实验,成功获取山基掩星观测数据,对掩星事件进行了分析和统计.给出利用山基掩星观测数据反演大气折射指数剖面和电波弯曲角的原理和算法.利用山基GPS掩星观测模拟数据,对反演方法进行试算和检验,结果表明反演方法准确可行.将该反演方法应用于观测数据的反演,获得了观测点高度以下的大气折射率剖面,以及电波弯曲角.实验结果和原理研究表明,山基掩星观测技术是一种潜在的低层大气环境监测新技术.Mountain-based GPS radio occultation observations were conducted at the Yaogu mountain and Jiugong mountain in Hubei province, respectively. Occultation event data were successfully obtained. Analysis and statistics of the occultation events have been completed. The principle and methods estimating bending angles of the radio rays and atmospheric refractivity profiles with the mountain-based radio occultation data are given. The simulation data of mountain-based occultation events are used for testing the inversion method. Testing results show that the inversion method is efficient. The atmospheric refractivity profiles below the height of the GPS receiver are obtained with this inversion technique, as well as the bending angle of rays. The results suggest that the mountain-based occultation technique is a potential new method for monitoring lower atmospheric environments.

关 键 词：山基GPS掩星观测 大气折射指数 电波弯曲角 低层大气 反演 

分 类 号：P406[天文地球—大气科学及气象学]