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。
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 firstlyorder,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.
出处
《计算机工程》
CAS
CSCD
北大核心
2016年第1期300-303,共4页
Computer Engineering
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
ionospheric delay model
ionospheric second-order
polynomial model
earth＇s magnetic field vector
surface fitting
