Institution: | 1. Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, Russian Academy of Sciences (IZMIRAN), Troitsk 142190, Moscow region, Russia;2. Space Research Institute, Russian Academy of Sciences, Moscow 117997, Russia;3. Institute of Atmospheric Physics, Academy of Sciences of the Czech Republic, 14131 Prague, Czech Republic;4. Institute of Experimental Physics, Slovak Academy of Sciences, 04001 Kosice, Slovakia;5. Institute of Gravitation and Space Sciences, 71111 Bucharest, Romania |