Fig. 4
From: Variations of f oF2 and GPS total electron content over the Antarctic sector
The foF2 monthly median values for San Martin during a high solar activity year (2000) are plotted against local time for the different seasons together with the IRI predicted foF2 values (CCIR and URSI). The seasons are represented by (a) January for Summer, (b) April for Fall, (c) July for Winter and October for Spring.