Physics of auroral phenomena : proceedings of the 33rd Annual seminar, Apatity, 02 - 05 March, 2010 / [ed.: A.G. Yahnin, A. A. Mochalov]. - Апатиты : Издательство Кольского научного центра РАН, 2011. - 206 с. : ил.

Conjugate and inter-hemispheric occurrence o f GPS TECfluctuations in high latitude ionosphere о RESO о NYAL disturbed day 27.07.2004 12 0 MCM4 disturbed day 27.07.2004 о DAV1 polar cap stations quiet day 21.07.2004 MCM4 auroral stations quiet day 21.07.2004 о RESO о NYAL 0 DAV1 Fig. 2. Spatial and temporal distribution of TEC fluctuation in geomagnetic local time and Corrected Geomagnetic Latitude using GPS measurements of 19 1GS stations. The pictures show the dynamics of the irregularity oval during quiet and disturbed conditions (Northern hemisphere) on 24 hour interval. 1Щ 1Ж Ж 4 ..Д 0 9 •liW a r r r ———r ijij 2094 pci, 10 15 - 10 - 5 0 I 0 z o. ■ftrt|rnTrjrni DAV1 1—I—I - - I I '1 - - 1 1 1 - - 1 1 1 - - 1 Г 1 - tlnJTTT<fj}fT!>JTflT> НИА- Г ' 15 - 10 - 5 0 ■10 - Я Ш М - - 1 1 1 - - 1 1 1 - - 1 1 I u 1 1 1 f lm j A i j r p ............... 15 10 5 0 0 6 12 18 24 0 6 12 18 24 0 6 12 18 24 0 6 12 18 24 0 6 12 18 24 Primary images of the auroral oval for the azimuth vector diagram were produced by the data described in (Feldstein at al., 1974; Zverev and Starkov 1975), which are based on the dependence of the oval parameters on the geomagnetic activity. The similarity between both diagrams is obviously, therefore one can see the valuable role of the auroral oval position for the events observed in the phase fluctuations and in the ionosphere irregularities, which can have adverse effects on communication and navigation systems. Normalized azimuth distribution of aurora inside the auroral oval and patches in TEC show a good similarity. This is because the GPS ray path trajectories are larger disturbed and worse fitted for working satellites pass through the area of the ionosphere with the auroras and the GPS-receiver signal violations. MCM4 UT UT UT UT Fig. 3. Diurnal variations of patch activity at different Antarctic stations over November 6-10, 2004. 153