SHIMHANDA, S.; CILLIERS, P.J.; FRANCIS, S. Analysis of ionospheric Total Electron Content variability determined from Global Navigation Satellite System data. Namibian Journal for Research, Science and Technology, [S. l.], v. 1, n. 1, p. 3–9, 2018. DOI: 10.54421/njrst.v1i1.4. Disponível em: https://njrst.ncrst.na/index.php/njrst/article/view/4. Acesso em: 6 nov. 2025.