Ionosphere delivering delay error is one of the main errors in the GPS measuring.
电离层传输延迟误差是GPS测量中主要误差之一。
2
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.
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。
3
Firstly, this paper introduces the structure of the ionosphere, related principles of the GPS and error sources.