Fig. 3From: Spread F occurrence and drift under the crest of the equatorial ionization anomaly from continuous Doppler sounding and FORMOSAT-3/COSMIC scintillation dataSequence of ionograms measured in Tucumán (26.9°S, 65.4°W) at a 00:30, b 01:10, c 01:50, and d 02:40 UT (solar local time LT = UT − 4.3) on February 2, 2014Back to article page