摘要
电离层延迟误差是影响BD2卫星导航系统定位测速精度的关键因素,如何减少电离层误差是当前卫星导航定位领域研究的热点问题。常见的电离层模型包括广域差分格网模型和Klobuchar模型,已有研究主要关注Klobuchar模型,对BD2广域差分格网模型的研究较少。本文分析比较了广域差分格网电离层模型和Klobuchar模型对电离层延迟误差的影响,并进行了真实环境下的评测。实验结果表明,使用广域差分格网电离层模型修正电离层延迟可以减小电离误差,从而提高单频接收机导航定位精度。
The ionospheric delay error is the key factor affecting the precision of position and velocity of the BD2 satellite navigation system, therefore, how to reduce the ionospheric error is extensively concerned in the field of satellite navigation and positioning. Regarding the two famous ionospheric models known as wide area differential grid model and Klobuchar model, the related research is mainly focused on the Klobuchar model, while the research on BD2 wide area differential grid model is less. The difference of wide area differential grid model and Klobuchar model in the ionospheric delay error is compared and analyzed in this paper, and the difference in the real satellite signal environment is evaluated. The experimental results show that the use of the wide area differential grid model to correct ionospheric delay can reduce the ionospheric error, which is compared with the use of the Klobuchar model. Thus, the navigation precision of singlefrequency receiver is improved.
出处
《航天控制》
CSCD
北大核心
2014年第6期12-15,共4页
Aerospace Control
