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.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
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)。
关键词
GPS
电离层折射误差
无电离层组合
GPS
ionospheric refractive error
ionosphere-free combination
