在这份报纸,我们开发一条途径在基于没有电离层的联合放的 GPS 上学习秒顺序 ionospheric 延期的效果(缩短了到 Lc ) GPS 双频率的搬运人阶段 observables,一阶的 ionospheric 延期在被消除了。从在 2003 年 4 月 923 日期间追踪车站的 IGS WUHN 的 GPS 数据被用来执行上述途径,并且结果证明在 GPS 所谓的没有电离层的 observables 的秒顺序 ionospheric 延期将导致放答案的 GPS 的常规向南方的移动。另外,在武汉区域上的秒顺序 ionospheric 延期上的地球磁场的影响被讨论,并且它显示地球磁场是秒顺序 ionospheric 延期导致在武汉区域上放答案的 GPS 的常规向南方的移动的主要因素之一。
In this paper,we develop an approach to study the effect of second-order ionospheric delay on GPS positioning based on the ionosphere-free combination (abbreviated to Lc) of GPS dual-frequency carrier phase observables,in which the first-order ionospheric delay has been eliminated.GPS data from IGS WUHN tracking station during April 9 23,2003 is used to perform the above approach,and results show that the second-order ionospheric delay in GPS so-called ionosphere-free observables will result in the regular southward shift of GPS positioning solution.Additionally,the influence of the Earth's magnetic field on second-order ionospheric delay over the Wuhan area is discussed,and it indicates that the Earth's magnetic field is one of the main factors why second-order ionospheric delay results in the regular southward shift of GPS positioning solution over Wuhan area.