Institution: | (1) Institute of Ionosphere State Enterprise, Academy of Sciences of Kazakhstan, Almaty, Kazakhstan;(2) Tien Shan High-Altitude Research Station, Almaty, Kazakhstan;(3) Lebedev Physics Institute, Russian Academy of Sciences, Leninskiĭ pr. 53, Moscow, 119991, Russia;(4) Research Institute of Radio Physics, Nizhni Novgorod, 603600, Russia |