| 基于球谐函数区域电离层模型建立 |
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| 引用本文： | 陈尚登,岳东杰,李亚.基于球谐函数区域电离层模型建立[J].测绘工程,2015(11):28-32. |
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| 作者姓名： | 陈尚登 岳东杰 李亚 |
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| 作者单位： | 河海大学 地球科学与工程学院,江苏 南京,210098 |
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| 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。
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| 关 键 词： | 电离层 T EC 球谐函数 格网 DCB |
The establishment of a regional ionospheric grid model based on spherical harmonic function |
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| Abstract: | 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 . |
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| Keywords: | ionosphere T EC spherical harmonic function grid DCB |
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