TY JOUR TI Upper atmosphere response to extratropical cyclones KW ultra-long-wave radio sounding KW atmospheric internal gravity waves KW extratropical cyclones KW ionosphere JO Solar-Terrestrial Physics AU Zakharov, V.I. AU Solovieva, M.S. AU Shalimov, S.L. AU Akperov, M.G. AU Korkina, G.M. AU Bulatova, N.R. PY 2025 IS 11 PB INFRA-M Academic Publishing LLC.