00635naa#a2200193#i#450# EN\\bibl\86525 20260314004851.6 2500-0535 20250326b2025####ek#y0engy0150####ca ENG RU Diurnal variations in characteristics of sporadic layer Eₛ over Irkutsk Journal article Irkutsk Institute of Solar-Terrestrial Physics SB RAS 2025 6 с. Journal article local Астрономия. Геодезия. 52 ENG Voronova Ekaterina Yurevna Ratovsky Konstantin Gennadyevich ras.editorum.ru