电离层GPS掩星观测改正TEC反演方法

	电离层GPS掩星观测改正TEC反演方法
	吴小成 ; 胡雄 ; 张训械 ; Jens ; Wickert
刊名	地球物理学报
	2006
卷号	49 期号:2 页码:328-334
关键词	电离层掩星改正TEC反演方法 GPS/MET CHAMP
ISSN号	0001-5733
其他题名	A calibrated TEC method for inversion ofionospheric GPS occultation data
通讯作者	北京8701信箱
中文摘要	电离层掩星观测中,当低轨卫星(LEO)轨道高度较低时,轨道以上的电离层电子总含量(TEC)对掩星反演的影响不能忽略.目前,一般采用指数函数等外推方法来处理该问题,对反演结果可能引起较大误差.为提高电离层掩星反演精度,本文研究利用LEO处于非掩星一侧GPS观测数据的改正TEC新反演方法.用三维射线追踪程序计算出电离层掩星观测模拟数据,分别应用改正TEC方法和外推方法进行反演,将反演结果与所用模式值进行比较.结果表明:对于轨道高度约800km的GPS MET掩星模拟数据,外推方法和改正TEC方法反演结果都与模式值基本一致;对于轨道高度约400km的CHAMP掩星模拟数据,外推方法误差较大,改正T...
英文摘要	When the low2Earth orbit (LEO) satellite is low , the contribution of the Total Electron Contents (TEC) above the satellite is not neglectable for inversion of GPS2LEO ionospheric occultation. The exponential extrapolate method which is widely used now may induce a big error,especially when LEO’s orbit is lower.We propose an inversion algorithm,calibrated TEC method,to estimate the TEC above LEO using the data from the non2occultation portion of the satellite track. We use the three2dimensional ray2tracing program to simulate the ionospheric occultation. Then we inverse the simulation data by the calibrated TEC method and exponential extrapolate method,and the results are compared with the model values. The results show that, for GPSPMET,the inversion profiles of the extrapolate method and the calibrated TEC method agree with the given model ionosphere,and the calibrated TEC method is better than the extrapolate method at higher altitude. For CHAMP,the errors of extrapolate method are large,and inversion profiles of the calibrated TEC method are consistent with the model values. Then , the calibrated TEC method is applied to the processing of actual GPSP MET ionospheric occultation data , and the inversion profiles are reasonable. These prove that the calibrated TEC method is a good algorithmfor inversion of ionospheric GPS occultation ,especially when the LEO’s orbit is lo.
学科主题	空间环境
收录类别	CSCD
资助信息	国家自然科学基金项目
语种	中文
CSCD记录号	CSCD:2325059
内容类型	期刊论文
源URL	[http://ir.cssar.ac.cn/handle/122/406]
专题	国家空间科学中心_空间环境部
推荐引用方式 GB/T 7714	吴小成,胡雄,张训械,等. 电离层GPS掩星观测改正TEC反演方法[J]. 地球物理学报,2006,49(2):328-334.
APA	吴小成,胡雄,张训械,Jens,&Wickert.(2006).电离层GPS掩星观测改正TEC反演方法.地球物理学报,49(2),328-334.
MLA	吴小成,et al."电离层GPS掩星观测改正TEC反演方法".地球物理学报 49.2(2006):328-334.