Galileo电离层折射误差高阶项的四频改正方法  

Four-frequency methods for correcting higher-order ionospheric refractive error in Galileo

作　　者：刘庆元[1] 王虎[1] 王潜心[1] 包海[1] 

机构地区：[1]中南大学信息物理工程学院,长沙410083

出　　处：《测绘科学》2008年第6期50-52,共3页Science of Surveying and Mapping

摘　　要：研究了电离层对Galileo观测信号的主要影响及电离层折射误差模型。针对Galileo中的四个频率,系统推导了四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三阶项,可进一步提高Galileo定位精度,同时,为Galileo定位提供了有力的技术手段。The main effect on the Galileo signals of ionosphere and ionospheric refractive model are studied in this paper. Because four-frequency are included in the Galileo system, the four-frequency corrected model of ionospheric refractive error and the ionospherefree combination model of four-frequency are deduced. The second-order ionospheric effect can be corrected and the positioning accuracy can be increased through these models. At the same time, these models supply the strong support in the Galileo techniques.

关 键 词：GALILEO 电离层折射误差 无电离层折射组合 

分 类 号：P223[天文地球—大地测量学与测量工程]