00639naa#a2200193#i#450# EN\\bibl\7279 20260308082119.7 2712-9640 20151217b2015####ek#y0engy0150####ca RUS RU Interpretation of oblique-incidence ionograms under the assumption of a spherically stratified ionosphere Journal article Irkutsk Institute of Solar-Terrestrial Physics SB RAS 2015 5 с. Journal article local Laryunin Oleg Albertovich Podlesnyi Aleksey Vitalyevich Romanovskii Oleg Anatol'evich zh-szf.ru