GPS和GLONASS组合的全球实测电离层TEC建模

Global Ionospheric TEC Modeling Using Measured GPS and GLONASS

摘要: 目的根据高精度卫星导航和电离层活动监测的需要,利用全球238个 GPS基准站的双频实测数据,通过建立球谐函数模型的同时解算电离层电子含量以及 GPS与 GLONASS卫星DCB及其相应的接收机DCB;将其结果与 CODE、IGS分析中心的结果进行比较分析,表明该方法建立的模型是可靠的,其 GPS和 GLONASS卫星 DCB相对于CODE精度优于0.1ns,相对于IGS精度优于0.2ns,其 GPS测站 DCB和 GLONASS测站DCB相对于 CODE和IGS精度优于1ns,垂直总电子含量相对CODE和IGS精度优于3TECU,组合结果精度高于组合前。

Abstract: Objective According to the requirements of high precision satellite navigation and ionosphere activitymonitoring,double-frequency measurement data from 238IGS stations are used to calculate verticalionosphere electron content(VTEC),DCB of GPS,GLONASS and the corresponding receiver basedon the spherical harmonic function model.The results show that this implemented model is reliable.The DCB precision of GPS and GLONASS obtained is less than 0.1ns when compared with the resultsof CODE and less than 0.2ns when compared with that of IGS.The DCB precision of GPS and GLO-NASS receivers are less than that 2ns,while the precision of VTEC is better than 3TECU in compar-ison with that of CODE and IGS,and better than before combination.