Investigation of Ionospheric Scintillation over South Africa and the South Atlantic Anomaly using GPS Signals: First Results. - Pierre Cilliers; Ben Opperman; Rory Meyer (IGARSS (2), 2009)

GPS Assistance in Modelling the Southern African Ionosphere. - Lee-Anne McKinnell; John Bosco Habarulema; Pierre Cilliers; Ben Opperman (IGARSS (2), 2009)

Imaging the Ionosphere over Southern Africa using GNSS Signals: Applications in Space Weather. - Ben Opperman; Pierre Cilliers (IGARSS (2), 2009)