多通道地基微波辐射计的1D-VAR反演算法研究  

1D-VAR Method for Multi-channel Ground-based Microwave Radiometer

作　　者：吕长春[1] 刘大伟[1] 刘凯[1] 谢衍[1] 苗俊刚[1] 

机构地区：[1]北京航空航天大学,北京100191

出　　处：《遥感信息》2013年第5期3-6,共4页Remote Sensing Information

基　　金：国家自然科学基金资助(41105007);北航基础科研项目资助(YWF-13-T-RCS-040)

摘　　要：地基微波辐射计当前已成为大气参数连续观测并同步反演天气预报的重要工具之一,研究表明随着辐射计通道数目的增多,信息量增大,数值天气的预报能力也会更强。本文着眼于较多通道的地基微波辐射计,探索尝试利用一维变分法对其大气廓线进行反演仿真,利用相关算法对反演结果的垂直分辨率和精确度进行了评估,同时对比了不同通道数量的辐射计的反演性能。结果表明,大气廓线垂直反演值能够以较小的误差接近数据库真实值,具有更高的垂直分辨率和反演精度,能够提供更准确的反演结果,这对较多通道的微波辐射计的研究论证有着重要作用,对提高天气的预报能力有着重要意义。Currently,ground-based microwave radiometer has been widely used in synchronous observation on atmospheric parameters and numerical weather prediction.Studies have shown that,with the increasing in number of the radiometer channels,more information and better numerical weather prediction performance will be obtained.In this paper,one dimensional variation method(1D-VAR)is used to retrieve the atmospheric profile from microwave radiometer with a large number of channels.The simulation results prove that it gives more approaching value to the real profile of database with a smaller error,which is important to the research of microwave radiometer with a large number of channels,and its significance for better weather prediction improvement.

关 键 词：地基微波辐射计 一维变分法 大气廓线 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]