Fig. 5From: Modulation of the ionosphere by Pc5 waves observed simultaneously by GPS/TEC and EISCATTime variations of the EISCAT electron density during 2003, October 31, 1250–1350 UT: a altitude-time plot (color scale), b N e variations altitude-integrated over the range 103–152 km (in TECu), and superposed vTEC variations GPS7/KIRU, c N e variations altitude-integrated over the range 152–415 km (in TECu) and superposed vTEC variations GPS7/KIRUBack to article page