摘要
在研究电离层折射对GPS测量的影响及电离层折射误差模型的基础上,采用电离层折射误差双频改正方法,针对GPS现代化和Galileo计划中增加的第三个民用导航频率,提出了运用三频观测值将电离层折射误差改正至二阶项的方法；并系统地推导了三频载波相位观测值无电离层折射组合方程,从而进一步提高了GPS的定位精度。
New possibilities for the refinement of ionospheric modeling and reduction of the ionospheric error in GPS measurements appear since a third-frequency will be introduced for the modernized GPS system. This paper investigates theoretical models of the ionospheric refractive error. A triple-frequency method of correcting the 1st and 2nd order ionospheric refraction is presented and a triple-frequency ionosphere-free combination method is proposed for the modernized GPS system. These new methods can be also applied to the european Galileo system. It is anticipated that the proposed refraction correction methods will play an important role in both the modernized GPS and Galileo systems.
出处
《航空电子技术》
2006年第3期13-15,20,共4页
Avionics Technology
