foF2 variations measured by the Rome observatory during solar minimum in the last three solar cycles

[摘要] The last three solar cycles have been considered for a study on the variation of the ionospheric parameter foF2 during the solar minimum. Hourly observations recorded by the ionospheric station of Rome have been considered for the years 1985, 1986, 1987,

[学科分类] 地球化学与岩石

[关键词] Ionosphere;foF2;ionospheric strorm;geomagnetic storms