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- W2993060963 abstract "Abstract A space-based augmentation system (SBAS) provides real-time correction data for global navigation satellite system (GNSS) users near ground. In order to use the SBAS ionosphere correction for low Earth orbit (LEO) satellites, the correction should be scaled down for the LEO altitude. This scale factor varies with ionosphere distribution and it is hard to determine the value at LEO in real time. We propose a real-time scale factor determination method by using Galileo GNSS’s NeQuick G model. A LEO satellite GPS data and SBAS data received on ground were used to evaluate the performance of the NeQuick G derived variable scale factor. The NeQuick G derived scale factor shows a significant accuracy improvement over NeQuick G model or pre-determined constant scale factor. It improves a vertical positioning accuracy of the LEO satellite. The error mean reductions of the vertical positioning over NeQuick G and the constant scale factor are 31.5% and 11.7%, respectively." @default.
- W2993060963 created "2019-12-13" @default.
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- W2993060963 date "2020-03-01" @default.
- W2993060963 modified "2023-10-16" @default.
- W2993060963 title "NeQuick G model based scale factor determination for using SBAS ionosphere corrections at low earth orbit" @default.
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- W2993060963 doi "https://doi.org/10.1016/j.asr.2019.11.038" @default.
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