Critical frequency and maximum electron density of F2 region over four stations in the North American sector

Ezquer, R. G., Cabrera, M. A., López, J. L., Albornoz, M. R., Mosert, M., Marcó, P., Burešová, D. Critical frequency and maximum electron density of F2 region over four stations in the North American sector. Journal of Atmospheric and Solar-Terrestrial Physics. 2011, 73(4), 420-429. ISSN 1364-6826. E-ISSN 1879-1824. Available: doi: 10.1016/j.jastp.2010.09.018.