00817naa#a2200205#i#450# EN\\bibl\33972 20260310100754.2 2500-0535 20191217b2019####ek#y0engy0150####ca ENG RU Estimating antenna coupling factor for problem of topside ionosphere sounding from space with using chirp signals Journal article Irkutsk Institute of Solar-Terrestrial Physics SB RAS 2019 6 с. Journal article local Астрономия. Астрофизика. Исследование космического пространства. Геодезия. 52 ENG Podlesnyi Aleksey Vitalyevich Naumenko Andrey Vitalyevich Cedrik Mark Vladislavovich ras.editorum.ru