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Features of behaviour of parameters of the ionosphere of high latitudes in moderate solar activity

The region of high-latitude areas draws the large attention. In Russia, Arctic and Antarctic Research institute restored a network of high-latitude ionosondes, confirming importance of knowledge of the critical frequency foF2 and the maximum height hmF2 of the ionosphere to provide conditions of radio-wave propagation in this region. However, there are gaps in ionosonde data often enough owing to many reasons (natural and technical). In these cases it is necessary to involve other sources of the information. In the present paper, such sources are empirical models of the ionosphere and measurement of the total electron content TEC. The purpose of this paper is a comparison of experimental values of foF2 and hmF2 with the model IRI2016 according to Russian high-latitude ionospheric stations and an estimation of possibilities to use the total electron content to provide information about ionospheric conditions. It was obtained, that deviations of model values from medians of parameters are at level of middle-latitude magnitudes, for instant values of foF2 deviations can reach 30 %. The usage of TEC allows reducing this estimation in 2–3 times. The basic attention is found for a situation during disturbances. It is shown that TEC allows to estimate zones of disturbances and to specify which stations get to these zones.