TY JOUR TI Studying the radial structure of the poloidal Alfvén resonator by the method of phase portraits from Van Allen Probes satellite data KW Alfvén waves KW poloidal resonator KW ULF waves KW satellite observations JO Solnechno-Zemnaya Fizika AU Vlasov, A.A. PY 2025 IS 11 PB INFRA-M Academic Publishing LLC.