(a) SuperDARN convection map with the ICI-2 flight overlaid. The coordinates are magnetic latitude and magnetic local time (MLAT, MLT). The black curve southwest of Svalbard represents the rocket trajectory above 200 km altitude. The rocket position at 10:42 UT (410 s flight time) is marked by a pink dot on the trajectory. (b) A zoom-in of 2 s high-resolution electron density data, where we have marked decameter scale plasma density gradients in red color. The altitude of the rocket payload, including horizontal distance traveled after 428 s, is shown as text along the time axis. The figure is adopted from Moen et al. (2012).