Fig. 1
From: Simultaneous ground-based optical and SuperDARN observations of the shock aurora at MLT noon
A magnetic latitude-magnetic local time (MLAT-MLT) projection of the Northern Hemisphere at 09:22 UT on 7 January 2005. Coverage of the instrumentation in polar region used in the study; the shaded circle shows the FOV of the ASI at YRS, the FOV of the SuperDARN CUTLASS Finland HF radar, its individual beams referred to in the text are bounded by solid lines and numbered approximately, and the four solid dots give the locations of the IMAGE chain magnetometers aligned with YRS. The IP shock plane roughly indicating the impingement is shown at the top of the figure