Fig. 6From: Effects of the postsunset vertical plasma drift on the generation of equatorial spread FExamples of plasma bubbles with large prereversal enhancement (PRE) detected by the C/NOFS satellite during three successive orbits (a, b, c) on 17 October 2011. From top to bottom are the C/NOFS orbit, the vertical ion drift velocity, and the ion density, respectively. (After Huang and Hairston 2015)Back to article page