TY JOUR TI Geomagnetic variations in the frequency range 2.5–12 Hz in the ionospheric F layer as measured by SWARM satellites KW ionosphere KW polar cusp KW geomagnetic pulsations JO Solnechno-Zemnaya Fizika AU Yagova, N.V. AU Fedorov, E.N. AU Pilipenko, V.A. AU Mazur, N.G. AU Martines-Bedenko, V.A. PY 2023 IS 9 PB INFRA-M Academic Publishing LLC.