TY JOUR TI Interpretation of oblique-incidence ionograms under the assumption of a spherically stratified ionosphere KW ionosphere KW oblique ionospheric sounding KW ionogram JO Solnechno-Zemnaya Fizika AU Laryunin, O.A. AU Podlesnyi, A.V. AU Romanovskii, O.A. PY 2015 IS 1 PB INFRA-M Academic Publishing LLC.