Long-term monthly statistics of the mid-latitude ionospheric E-layer peak electron density in the Northern geographic hemisphere during geomagnetically quiet and steadily low solar activity conditions

[摘要] Long-term hourly values of the ionospheric E-layer peak electron density, NmE, measured during the time period of 1957-2014 by 4 mid-latitude ionosondes (Wallops Island, Boulder, de l’Ebre, and Rome) in the Northern geographic hemisphere were processed to

[学科分类] 地球化学与岩石

[关键词] Mid-latitude ionosphere