广播电离层模型性能评估及分析

Performance estimation and analysis on broadcast ionospheric model

针对目前各卫星导航系统分别采用不同的广播电离层延迟改正模型来帮助单频用户修正电离层延迟的现状,提出一种基于双频改正模型来评估各广播电离层延迟改正模型性能的方法,分析4种广播电离层延迟改正模型在中国及周边区域不同纬度、不同月份等条件下的应用性能。研究结果可为广播电离层监测评估以及单频导航与定位提供参考。

Aiming at the current si tuat ion that the satel l i te navigat ion systems use di f ferent broadcast ionospheric delay models to help the single frequency user correcting the ionospheric delay, the paper proposed a method based on dual-frequency correcting model to assess the performance of broadcast ionospheric delay models, analyzed the performance of four broadcast ionospheric delay models under the conditions of the regions of China and the neighbor, at different latitudes and different months. The study result could provide a reference for the evaluation of ionospheric monitoring, and the navigation and positio-ning of single frequency.