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计算机工程

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顾及二阶项影响的电离层延迟模型研究

牛瑞朝,郭承军,张奕然   

  1. (电子科技大学电子科学技术研究院,成都 611731)
  • 收稿日期:2015-01-15 出版日期:2016-01-15 发布日期:2016-01-15
  • 作者简介:牛瑞朝(1987-),男,硕士研究生,主研方向为卫星导航;郭承军,博士;张奕然,硕士研究生。

Study of Ionospheric Delay Model Considering Second-order Effects

NIU Ruizhao,GUO Chengjun,ZHANG Yiran   

  1. (Research Institute of Electronic Science and Technology,University of Electronic Science and Technology of China,Chengdu 611731,China)
  • Received:2015-01-15 Online:2016-01-15 Published:2016-01-15

摘要: 在测量与定位领域建立电离层延迟模型是消除电离层影响的有效手段。传统的电离层延迟模型仅考虑一阶项的影响,不能满足精密测量和定位的需求。为此,采用曲面拟合的方法求解地磁场矢量,在不损失精度的情况下,曲面拟合法能够达到简化计算、方便使用的目的。推 导顾及电离层二阶项延迟的天顶方向电子总含量(VTEC)模型的观测方程,建立顾及电离层二阶项延迟的VTEC模型。结合武汉跟踪站的数据对所建模型进行检验,证明该模型具有较高的定位精度。

关键词: 电离层延迟模型, 电离层二阶项, 多项式模型, 地磁场矢量, 曲面拟合

Abstract: In the field of measurement and positioning,establishing ionospheric delay model is an effective means of eliminating the influence of the ionosphere.Previous ionospheric delay model only considers the influence of firstly-order,this can no longer meet the needs of precision measurement and positioning.Using surface fitting method to solve Earth’s magnetic field vector,the results prove that,without loss of accuracy,using surface fitting can achieve the purpose of simplifying calculations and convenient use.The observation equation of Vertical Total Electron Content(VTEC) model is derived by considering the second-order ionospheric effects,establishing the VTEC model by considering the second-order ionospheric effects.Combined with the data of Wuhan tracking station to test the model’s performance,high precision of the model is proved.

Key words: ionospheric delay model, ionospheric second-order, polynomial model, earth’s magnetic field vector, surface fitting

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