00647naa#a2200193#i#450# EN\\bibl\6469 20260311003814.3 2712-9640 20151217b2015####ek#y0engy0150####ca RUS RU Registration of ionospheric effect of 20 March 2015 solar eclipse from GPS data in single-frequency mode Journal article Irkutsk Institute of Solar-Terrestrial Physics SB RAS 2015 4 с. Journal article local Gorbachev Oleg Anatolyevich Ivanov Vsevolod Borisovich Kholmogorov Andrey Aleksandrovich ras.editorum.ru