Mikhailov AV, de la Morena BA, Miro G, Marin D. A method for f0F2 monitoring over Spain using the El Arenosillo digisonde current observations. Ann. Geophys. [Internet]. 1999Nov.25 [cited 2024Apr.24];42(4). Available from: https://www.annalsofgeophysics.eu/index.php/annals/article/view/3748