Probing the high latitude ionosphere from ground-based observations: The state of current knowledge and capabilities during IPY (2007-2009)

Alfonsi, L., A. J. Kavanagh, E. Amata, P. Cilliers, E. Correia, M. Freeman, K. Kauristie, R. Liu, J.-P. Luntama, C. N. Mitchell, G. A. Zherebtsov J. Atmos. Solar Terr. Phys., 70, 18, 2293-2308, doi:10.1016/j.jastp.2008.06.013 2008