区域电离层延迟模型的建立及精度对比分析

Establishment of Regional Ionospheric Delay Model and Comparative Analysis of Its Accuracy

利用相位平滑伪距观测值,分别用三角级数模型和多项式模型构建了中国区域的电离层延迟改正模型。将所建的模型与Klobuchar模型、双频改正用单点定位程序进行测试后表明:两种模型对区域内的单频GPS用户改正效果明显优于Klobucar模型;在电离层活跃地区分时段的多项式模型要优于全天的三角级数模型,DCB结果分析也表明所建立的区域电离层模型是可靠的。

In this paper,the model of ionospheric delay correction in China is constructed by using the trigonometric series model and the polynomial model.After testing the model with the Klobuchar model and the single point location program,the results show that the correction effect of the two models to the single-frequency GPS users in the region is significantly better than that of the Klobucar model.The polynomial model of the time interval in the ionospheric active region is better than that of the whole day trigonometric series model.The analysis of DCB results also shows that the established model of ionospheric layer is reliable.