Fig. 4
From: Modulation of the ionosphere by Pc5 waves observed simultaneously by GPS/TEC and EISCAT
Time variations of the EISCAT electron density during 2003, October 31, 1100–1200 UT: a altitude-time plot (color scale); b N e variations (blue line) altitude-integrated over the range 103–152 km (in TECu), and superposed TEC variations (red line) from GPS9/KIRU; c N e variations altitude-integrated over the range 152–415 km (in TECu) and superposed vTEC variations GPS9/KIRU