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.
出处
《测绘科学》
CSCD
北大核心
2008年第6期50-52,共3页
Science of Surveying and Mapping
