The multi-source data fusion global ionospheric modeling software—IonoGim |
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Authors: | Peng Chen Jiajun Chen |
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Institution: | 1. College of Geomatics, Xi’an University of Science and Technology, Xi’an 710054, China;2. State Key Laboratory of Geodesy and Earth’s Dynamics, Wuhan 430077, China;3. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China |
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Abstract: | We introduce a new global ionospheric modeling software—IonoGim, using ground-based GNSS data, the altimetry satellite and LEO (Low Earth Orbit) occultation data to establish the global ionospheric model. The software is programmed by C++ with fast computing speed and highly automatic degree, it is especially suitable for automatic ionosphere modeling. The global ionospheric model and DCBs obtained from IonoGim were compared with the CODE (Center for Orbit Determination in Europe) to verify its accuracy and reliability. The results show that IonoGim and CODE have good agreement with small difference, indicating that IonoGim owns high accuracy and reliability, and can be fully applicable for high-precision ionospheric research. In addition, through comparison between only using ground-based GNSS observations and multi-source data model, it can be demonstrated that the space-based ionospheric data effectively improve the model precision in marine areas where the ground-based GNSS tracking station lacks. |
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Keywords: | Global ionospheric model GNSS IonoGim Altimetry Occultation |
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