Physics of auroral phenomena : proceedings of the 39th annual seminar, Apatity, 29 February-4 March, 2016 / [ed. board: N. V. Semenova, A. G. Yahnin]. - Апатиты : Издательство Кольского научного центра РАН, 2016. - 167 с. : ил., табл.

Ionospheric effects during the total solar eclipse at high latitudes For examples, we consider the data of calculation of the periods of wave manifestations in the electron concentration for heights of 68 km ("short night") and 90 km (wave processes). The filtered electron concentration and its wavelet-spectrum for heights of 68 km (at the left) and 90 km are given in Fig. 5 (on the right). Time. UT 10 10.5 Time, UT Figure 5. The filtered electron concentration (upper) and its wavelet-spectrum (bottom) At the beginning of the eclipse in the electron concentration at the height of 68 km waves with the periods of 23 and 57 minutes have been seen. The wave with the period of 57 minutes was gradually weakened and by the end of the eclipse has disappeared. The wave with the 23 minutes period also weakened to the eclipse maximum, but at the same time at 9:30 UT has begun to transform to two weak waves with the periods of 18 and 28 minutes. At the eclipse maximum waves with the periods of 18 and 28 minutes have begun to transform to the waves with periods of 23 and 37 minutes, respectively. At 10:40 UT the wave with the period of 23 minutes transformed to two waves with the periods 14 and 28 minutes. At the same time the wave with the period of 37 minutes began to transform to the wave with the period of 28 minutes. , and the wave with the period of 14 minutes has amplified. By the end of the eclipse all waves have weakened. At the height of 90 km at the beginning of the eclipse the wave with the period about 46 minutes had appeared. At approach to the maximum of the eclipse, the period of the wave had begun to increase till 57 minutes, at the same time its intensity also increased. After the eclipse maximum intensity and the period of the wave began to decrease. Before the eclipse the stronger wave was the wave with the period of 27 minutes. At approach to the eclipse maximum the amplitude of the wave decreased, but after the maximum it increased the intensity. Moreover, the wave period after the maximum began to increase continuously and by the end of the eclipse its period and the decreasing period of the wave of 57 minutes passed into one period about 46 minutes. At the height of 68 km waves with the smaller periods of 10-30 min were more intensive ones. At the same time at the eclipse maximum these waves decreased on amplitude, and then increased again. At the same time with observations by the facility of partial reflections, measurements of cosmic noise absorption with use of a standard riometer were carried out. In Fig. 6, a the filtered data of cosmic noise absorption level with the periods from 6 to 90 minutes, and in Fig. 6, b the wavelet-spectrum of the filtered data are shown. The continuous line in the bottom of Fig. 6, a is the eclipse time in the place of observations (observatory ‘Tumanny”) and in the bottom of Fig. 6, b is the time of the eclipse on the Earth (the specified times show emergence and leaving of a penumbra from the Earth's surface). Before the eclipse over observatory ‘Tumanny” two waves with the periods of 18 and 46.5 min have appeared. At approach to the eclipse maximum at the observatory “Tumanny” the wave with the period of 46.5 min has begun to weaken and at the eclipse maximum has transformed on two waves with the periods o f 28.5 and 51.5 min, but then gradually their periods have begun to change. They have again come to the end of the eclipse to the one period, smaller, than prior to stratification, and equal 36.5 min. The wave with the period of 18 min at approach to the eclipse maximum has disappeared. Time. UT Figure 6. (a) the filtered data of cosmic noise absorption level according to the riometer measurements, (b) the wavelet-spectrum of the filtered data 95