电离层改正模型对GPS共视时间传递的影响分析

本文以2016年001~010 d的观测数据,分析了广播星历的电离层模型、全球格网电离层模型、消电离层组合模型三种不同的电离层模型对4对IGS站间GPS共视时间频率传递的影响。结果表明,广播电离层模型模式下GPS共视时间频率传递的RMS值最大,表明精度最差;电离层格网模型模式下RMS值较小,表明精度比较高,消电离层组合模型模式下除了NANO跟ALBH的站间RMS值大外,相应的精度较差外,其它3组站间跟电离层格网模型的精度相当。

Influence of Ionospheric Correction Model on Time Transfer with GPS Common-View

Taking the data of 001~010 days in 2016 as example, the influence of Time and Frequency Transfer with GPS Common-view about four station to station based on three different ionospheric models were introduced in this paper. The RMS result indicates that accuracy under Klobuchar ionospheric model is the worst, the accuracy under Grids ionospheric model is the best, except NANO and ALBH station to station, the others accuracy under Ion-free combination ionospheric model are as well as Grids ionospheric model.