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- W2394899195 abstract "The coverage area of a GNSS regional ionospheric delay model is mainly determined by the distribution of GNSS ground monitoring stations. Extrapolation of the ionospheric model data can extend the coverage area. An extrapolation algorithm, which combines observed ionospheric delay with the environmental parameters, is proposed. Neural network and least square regression algorithms are developed to utilize the combined input data. The bi-harmonic spline method is also tested for comparison. The IGS ionosphere map data is used to simulate the delays and to compute the extrapolation error statistics. The neural network method outperforms the other methods and demonstrates a high extrapolation accuracy. In order to determine the directional characteristics, the estimation error is classified into four direction components. The South extrapolation area yields the largest estimation error followed by North area, which yields the second-largest error." @default.
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- W2394899195 date "2016-03-30" @default.
- W2394899195 modified "2023-09-25" @default.
- W2394899195 title "Extending Ionospheric Correction Coverage Area By Using A Neural Network Method" @default.
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- W2394899195 doi "https://doi.org/10.5139/ijass.2016.17.1.64" @default.
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