微波辐射计与GPS联合反演大气折射率  

Retrieving Atmospheric Refractivity by Microwave Radiometer Combined with GPS

作　　者：李江漫[1] 郭立新[1] 林乐科[2] 赵振维[2] 韩恒敏[1] 

机构地区：[1]西安电子科技大学理学院,西安710071 [2]中国电波传播研究所电波环境特性及模化技术重点实验室,青岛266107

出　　处：《微波学报》2013年第4期43-47,共5页Journal of Microwaves

基　　金：国家杰出青年科学基金资助项目(61225002)

摘　　要：地基单站微波辐射计是被动反演对流层大气折射率剖面的一种有效设备,亮温是其进行反演的基础量。地基单站GPS(Global Position System)接收到的低仰角信号的斜路径延迟也是进行对流层折射率剖面反演的基础量。由于对流层的中低层大气变化较大,以上两种设备对其折射率的反演误差较大。将地基单站微波辐射计与地基单站GPS两种设备的实测数据相结合,建立联合反演模型,可以综合两种探测设备对大气不同层结的敏感性,有效改善对流层中低层折射率的反演精度。对太原和青岛两个地区历史探空数据的仿真反演结果验证了此联合模型的有效性。Single ground-based radiometer is an efficient equipment to retrieve the troposphere atmosphere refractivity profile, and the brightness temperature is the basal quantity for retrieving. The slant path delay of low elevation which is re- ceived by single ground-based global position system is also the basal quantity to retrieve troposphere atmosphere refractivity profile. Due to the variety of bottom troposphere atmosphere, large errors are generated for retrieving the refractivity profile u- sing above two equipments. The inversion model can be built by combining the data of above two equipments, which can col- ligate the sensitivity to different layer of the atmosphere and improve the retrieving precision of the bottom of troposphere at- mosphere efficiently. The simulation of historical data of Taiyuan and Qingdao in China validates the correctness of the com- bined model.

关 键 词：微波辐射计 GPS 反演 折射率 

分 类 号：TN965.5[电子电信—信号与信息处理] P401[电子电信—信息与通信工程]