Objects
McKinnell, Lee-Anne, Opperman, Ben D L, Cilliers, Pierre J. GPS TEC and ionosonde TEC over Grahamstown, South Africa: first comparisons. 2007.
Opperman, Ben D L, Cilliers, Pierre J, McKinnell, Lee-Anne, Haggard, Raymond. Development of a regional GPS-based ionospheric TEC model for South Africa. 2007.
Habarulema, John B, McKinnell, Lee-Anne, Cilliers, Pierre J, Opperman, Ben D L. Application of neural networks to South African GPS TEC modelling. 2009.