摘要
利用GPS双频观测数据建立高精度、准实时的区域电离层总电子含量(TEC)模型是电离层研究的一个重要手段。文中探讨IGS观测站数据结合4阶球谐函数建立区域电离层格网模型的方法,并对硬件延迟(DCB)和TEC建模结果的可靠性进行分析,结果表明,DCB解算精度在0.4ns以内,TEC内外精度优于1.4TECU(1TECU=1016电子数/m2)和1.5TECU,满足导航定位中电离层改正的需要。
Using GPS dual‐frequency observation data to establish a high‐precision and near‐real‐time regional ionospheric total electron content （TEC） model is an important means of ionospheric research . This paper discusses the process of establishing the regional ionospheric grid model by using the data from nine European IGS stations with 4 order spherical harmonic function .Also ,the reliability of differential code bias （DCB） and TEC results are analyzed .The results show that DCB calculating accuracy is better than 0.4ns ,and the average internal and external accuracy of TEC are better than 1.4TECU （1TECU=1016electron/m2 ） and 1.5TECU ,respectively .So it can meet the needs of the ionosphere correction in the satellite navigation and positioning .
出处
《测绘工程》
CSCD
2015年第11期28-32,共5页
Engineering of Surveying and Mapping
关键词
电离层
T
EC
球谐函数
格网
DCB
ionosphere
T EC
spherical harmonic function
grid
DCB
