Abstract
We present a brief description and comparative analysis of the Klobuchar, GEMTEC, and NTCM-GL models of total electron content in the ionosphere. The quality of model performance against experimental data on the total electron content is compared. Statistical estimates for the residual positioning error are obtained for each of these models on the basis of the international Global Navigation Satellite Systems (GNSS) Service data. The GEMTEC and NTCM-GL models are shown to have a higher positioning accuracy than the Klobuchar model. The best results of the ionospheric error correction are provided by the GEMTEC model.
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