00635naa#a2200193#i#450# EN\INFRA-M\bibl\6469 20241229191703.7 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 Moscow INFRA-M Academic Publishing LLC. 2015 4 с. Journal article local Gorbachev Oleg Anatolyevich Ivanov Vsevolod Borisovich Kholmogorov Andrey Aleksandrovich naukaru.ru