%0 Journal Article %T Solving a navigation problem with the total electron content model GEMTEC %A Kholmogorov, A.A. %A Ivanov, V.B. %A Gorbachev, O.A. %K GPS, single-frequency receiver, ionosphere models %J Solar-Terrestrial Physics %D 2019 %N 5 %P 3 %I INFRA-M Academic Publishing LLC.