RADICELLA, S. M.; ZHANG, M. L. The improved DGR analytical model of electron density height profile and total electron content in the ionosphere. Annals of Geophysics, [S. l.], v. 38, n. 1, 1995. DOI: 10.4401/ag-4130. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/4130. Acesso em: 26 apr. 2024.