Fig. 11
From: Review of the accomplishments of mid-latitude Super Dual Auroral Radar Network (SuperDARN) HF radars
LOS Doppler velocity for a 1-min scan of WAL showing a strong sub-auroral westward flow channel. Overlaid is a swath of the 135.6 nm aurora from TIMED GUVI, cross-track drift velocity from the DMSP F15 spacecraft, and the track of the NOAA-18 spacecraft, which are used to determine the equatorward edge of electron precipitation (shown as a thick dotted line). Adapted from Fig. 1 of Oksavik et al. (2006)