Abstract
GNSS ionospheric correction models for single frequency user are realized through the combination of the information of long term variation from available background ionospheric model and the real-time information from GNSS measurements. Method of ionospheric model driven by GNSS data and models for the driven factor are cores for the GNSS ionospheric model. A factor of Equivalent Irradiation (ER) is introduced for ionospheric model driven method, and a new model of the factor for prediction is put forward based on its temporal and spatial variations, including a linear term and a periodic term. Analysis shows that the relative accuracy of more than 70 % could be achieved for GNSS ionospheric model based on the new driven factor model, better than that of GALILEO realization which based on a three-coefficient factor model. The driven factor model in GALILEO is a specific realization of the new model when a simplification is used.
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Acknowledgments
This work is sponsored by the International Technological Cooperation Projects (No. 2011DFA22270).
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Liu, D., Yu, X., Chen, L., Zhen, W. (2015). An Improved GNSS Global Ionospheric Model. In: Sun, J., Liu, J., Fan, S., Lu, X. (eds) China Satellite Navigation Conference (CSNC) 2015 Proceedings: Volume II. Lecture Notes in Electrical Engineering, vol 341. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-46635-3_31
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DOI: https://doi.org/10.1007/978-3-662-46635-3_31
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