D.E. Edemsky1, V.E. Tumskoy2, I.V. Prokopovich3

1,3 Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation RAS (Moscow, Russia)

2 Melnikov Permafrost Institute, SB RAS (Yakutsk, Russia)

3 MIREA – Russian Technological University (Moscow, Russia)

1 deedemsky@gmail.com, 2 vtumskoy@gmail.com, 3 prokop@izmiran.ru