Physics of auroral phenomena : proceedings of the 36th Annual seminar, Apatity, 26 February – 01 March, 2013 / [ed. board: A. G. Yahnin, A. A. Mochalov]. - Апатиты : Издательство Кольского научного центра РАН, 2013. - 215 с. : ил., табл.

M. G. Botova et al. Fig. 2 shows the latitudinal variations of the total electron content (TEC) calculated by version o f UAM-TM and empirical model IRI-2007 and GPS data for the magnetic meridian 15-03 MLT. Fig. 1-2 shows that in the NmF2 variations: 1) The best agreement between the UAM, IRI and GPS results takes place over the South Pole for the summer conditions at high solar activity according to with [4], so they do not increased; 2) The good agreement takes place over the North Pole for the spring conditions at low solar activity; 3) The worst agreement takes place for the winter conditions over both poles at different levels of solar activity; 4) The worst agreement takes place for regions of the main ionospheric trough region in all seasons at different levels of solar activity. The TEC variations keep the same features as they are determined by the variations in NmF2. Conclusion Fluxes' of the soft electrons precipitating at the polar caps, increased in our model calculations by an order, raise the electron density in the polar caps F2-layers to the level o f the IRI empirical model and even exceed this level, but for the regions of the main ionospheric trough this increase does not improve the situation. Thus, by increasing by an order of the flux o f the soft electrons precipitating at the polar caps it is possible to reach the NmF2 and TEC values of the IRI empirical model and TEC GPS, but this increase is unrealistic. We consider therefore these differences between the values of NmF2 and TEC for UAM, IRI and GPS results are due to the lack of the ionospheric observations at the polar caps. We believe that the UAM model reproduces the real low F2-layer electron density and TEC over the polar caps and the main ionospheric trough resulting due to the polar wind and magnetospheric convection action. References 1. J.D.Winningham, W.J.Heikkila, Polar cup auroral electron fluxes observed with ISIS 1, J. Geophys. Res., 1974, 79, 949. 2. A.A. Namgaladze et al., Global model of the upper atmosphere with variable latitudinal integration step, Geomagn. and Aeronomy Int., 1998, 1, 53-58. 3. J.M. Picone et al., NRLMSISE-00 empirical model of the atmosphere: Statistical comparisons and scientific issues, J. Geophys. Res., 2002, 107, 1468. 4. D.A. Hardy et al., A statistical model of auroral precipitation, J. Geophys. Res., 1985, 90, 4229-4248. 5. D. Bilitza, B.W.Reinisch, International reference ionosphere 2007: improvements and new parameters, Adv. Space Res., 2008,42, 599-609. 6 . ftp://cddis.gsfc.nasa.gov/pub/gps/products/ionex 146