GPS现代化后电离层折射误差高阶项的三频改正方法  

Triple-Frequency Methods for Correcting Higher-Order Ionospheric Refractive Error in GPS Modernization

作　　者：伍岳[1] 孟泱[1] 王泽民[1] 徐绍铨[1] 

机构地区：[1]武汉大学测绘学院,武汉市珞喻路129号430079

出　　处：《武汉大学学报（信息科学版）》2005年第7期601-603,608,共4页Geomatics and Information Science of Wuhan University

基　　金：国家国土资源部资助项目(国地防灾[2003]031709)。

摘　　要：研究了电离层对GPS观测信号的主要影响及电离层折射误差模型,总结了电离层双频改正模型。针对GPS现代化中增加的第三频率,系统推导了三个频率的电离层改正模型及相位观测值无电离层组合(LC组合)模型。该模型将电离层折射误差模型改正至二阶项,可进一步提高GPS定位精度,同时,为GPS定位中其他误差的改正及分离、周跳的探测等提供了有力的技术手段。The main effect on the GPS signals of ionosphere and ionospheric refractive model are researched in this paper; then the dual-frequency corrected model of ionospheric refractive error is concluded. Aiming at the third frequency added in GPS Modernization, the triple-frequency corrected model of ionospheric refractive error and the ionosphere-free combination model of triple-frequency is deduced. The second-order ionospheric effect can be corrected and the positing accuracy can be increased through these models. At the same time, these models supply the strong support in other GPS techniques such as separating error sources in GPS, cycle slip detection and etc.

关 键 词：GPS 电离层折射误差 无电离层组合 

分 类 号：P228.41[天文地球—大地测量学与测量工程]