AFRAIMOVICH, E. L.; KARACHENSCHEV, V. A. Testing of the transionospheric radiochannel using data from the global GPS network. Annals of Geophysics, [S. l.], v. 46, n. 6, 2009. DOI: 10.4401/ag-3469. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/3469. Acesso em: 29 mar. 2024.