中国空间科学技术 ›› 2019, Vol. 39 ›› Issue (1): 25-.doi: 10.16708/j.cnki.1000-758X.2018.0066

• 研究探讨 • 上一篇    下一篇

北斗区域Klobuchar改进模型及其修正精度分析

刘瑞华,薛凯敏,王剑   

  1. 1中国民航大学电子信息与自动化学院,天津300300 2中国民航大学民航航空器适航审定技术重点实验室,天津300300
  • 出版日期:2019-02-25 发布日期:2019-02-25

Regional improved Klobuchar model for BeiDou and its correction accuracy analysis

LIU Ruihua,XUE Kaimin,WANG Jian   

  1. 1College of Electronic Information and Automation, Civil Aviation University of China, Tianjin 300300, China 2Key Laboratory of Civil Aircraft Airworthiness Technology,Civil Aviation University of China, Tianjin 300300, China
  • Online:2019-02-25 Published:2019-02-25

摘要: 北斗卫星导航系统采用Klobuchar模型修正单频接收机用户的电离层延迟误差,由于此模型从亚洲地区应用角度考虑,在某一特定区域的修正精度甚至不足50%。为进一步提高区域电离层延迟修正精度,提出在原模型8个改正参数的基础上增加5个关键参数的Klobuchar改进模型,并采用松弛迭代与直线搜索法中的黄金分割相结合的算法对新增参数进行求解。以天津及其附近区域为例,利用GPStation6接收机采集到的实测数据对改进模型与原模型进行计算。将国际全球导航卫星系统服务组织(International GNSS Service,IGS)发布的全球电离层格网数据作为参考值,对比分析改进模型与原模型的修正精度。结果表明,区域Klobuchar改进模型在天津及其附近区域的电离层延迟平均修正精度比原模型提升了10.46%,平均修正精度达到77.51%。

关键词: 北斗卫星导航系统, 电离层延迟修正, Klobuchar模型, 松弛迭代, 黄金分割

Abstract: The BeiDou satellite navigation system uses the Klobuchar model to correct the ionospheric delay error for single frequency receiver users. However, due to the application of this model from the perspective of the Asian region, the correction accuracy in a specific region is even less than 50%.In order to further improve the accuracy of regional ionospheric delay correction, an improved Klobuchar model that adds five key parameters on the basis of eight correction parameters of the original model was proposed, and then the values of these additional parameters were obtained through the algorithm combining relax iterative and the golden section of the linear search.Taking Tianjin and its vicinity as an example, the measured data collected by the GPStation6 receiver was used to calculate the improved model and the original model.The global ionospheric grid data published by the International GNSS Service (IGS) was used as a reference value to compare and analyze the accuracy of the improved model and the original model.The results show that the average correction accuracy of ionospheric delay of the improved model in Tianjin and its vicinity is 10.46% higher than that of the original model, and the average accuracy reaches 77.51%.

Key words: BeiDou satellite navigation system, ionospheric delay correction, Klobuchar model, relax iterative, golden section