METHOD OF CALCULATING TEC WITH GPS DATA AND ITS APPLICATION TO THE IONOSPHERIC DISTURBANCES
METHOD OF CALCULATING TEC WITH GPS DATA AND ITS APPLICATION TO THE IONOSPHERIC DISTURBANCES
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发表时间：
2000
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通讯作者：
D. Zhang
中科院分区：
文献类型：
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作者：
D. Zhang
本文综述了利用双频GPS接收机计算总电子含量的方法。分析了利用伪距和载波相位计算TEC的误差来源。考虑到GPS卫星的信噪比（signal-noise-rate，SNR）与高程的关系，详细讨论了同时利用伪距和载波相位计算绝对TEC的方法，并与通常采用代数和法计算绝对TEC的方法进行了比较。分析了卫星和接收机的仪器偏差及其消除方法。为了确定接收机偏差，将GPS TEC结果与IRI模型TEC结果进行比较。结果表明，仅利用少量GPS数据和IRI模型修正接收机仪器偏差是困难的，需要进行统计分析。在此基础上，利用中国4个GPS台站的观测资料，重点研究了电离层扰动对太阳耀斑、潮汐和1997年3月9日日食的影响。结果表明，利用该方法计算ＴＥＣ的精度可满足电离层扰动现象的研究.
The methods of calculating total electron content (TEC) by using of the dual- frequency GPS receiver are summarized in this paper. Error sources of calculating TEC using pseudorange and carrier-phase are analyzed. Considering the relation between the GPS SNR(signal-noise-rate) and elevation of the GPS satellites, the method of calculating absolute TEC by using pseudorange and carrier-phase simultaneously was particularly discussed and compared with that usually used to calculate absolute TEC by algebraic sum. The instrumental bias of satellite and receiver and their removing method are also analyzed. In order to determine the receiver bias, the GPS TEC result and the IRI model TEC result are compared. It is concluded that correcting the receiver instrumental bias using only little GPS data and IRI model is difficult instead, statistics are necessary. With the method presented in this paper based on the above discussions, the responses for ionospheric perturbations were studied using data from four China GPS stations with emphasis on the ionospheric Perturbations such as the effects of solar flare, TIDs and solar eclipse in March 9~(th) 1997. The results show that the accuracy of the method is sufficient in studying the ionospheric disturbances.