Variation of single-frequency GPS positioning errors at Taiwan based on Klobuchar ionosphere model
Variation of single-frequency GPS positioning errors at Taiwan based on Klobuchar ionosphere model
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DOI：
10.1109/ursigass.2014.6929767
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发表时间：
2014-10
期刊：
影响因子：
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通讯作者：
Jinghua Li;G. Ma
中科院分区：
文献类型：
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作者：
Jinghua Li;G. Ma
本文利用台湾桃园（121.1°E，24.6°N）IGS GPS接收机10年的单频伪距观测资料，分析了定位误差与太阳活动变化的关系。通过求解伪距方程组来获得接收机在每个历元的位置。定位误差被定义为方程组中的位置与IGS发布的位置之间的差异。在定位解算过程中，采用Klobuchar模型对电离层距离延迟进行修正。结果表明，在太阳活动高的年份，定位误差大于在太阳活动低的年份。对于单频GPS接收机，电离层延迟是主要的误差源，而单频GPS接收机的误差主要受太阳活动的控制。
In this paper, ten year's single-frequency pseudorange observations from one IGS GPS receiver at Taoyuan (121.1°E, 24.6°N), Taiwan, were used to analyze the relation of the positioning error to the changes of the solar activities. The receiver's position at each epoch is obtained by solving the pseudorange equation set. Positioning error is defined as the difference between the position from the equation set and the position published by IGS. The Klobuchar model is used the correct the ionospheric range delay during the positioning solution. The results showed that during the high solar activity years the positioning error is larger than that during the low solar activity years. For the single-frequency GPS receiver, the ionospheric delay is the main error source, and the error of the single-frequency GPS receiver is mainly controlled by the solar activity.