Fig. 3From: Variations of f oF2 and GPS total electron content over the Antarctic sectorThe monthly median values of GPS TEC are plotted against local time 4 different seasons to illustrate the diurnal and seasonal variations for the years (a) 2000 and (b) 2001 representing high solar activity and (c) 2007, (d) 2008, representing low solar activity.Back to article page