BELEHAKI, A.; MORAITIS, G.; TSAGOURI, I. On the derivation of an hourly local index to define the normal ionosphere. Annals of Geophysics, [S. l.], v. 43, n. 1, 2000. DOI: 10.4401/ag-3629. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/3629. Acesso em: 25 apr. 2024.