Figure 4
From: Aspect angle sensitivity of pump-induced optical emissions at EISCAT
Optical emissions for various pump beam pointing directions (top) and coherent radar backscatter (bottom). The top panel shows the 630-nm background subtracted intensity in the magnetic zenith (red) and the position where the pump beam was pointing (black). The green line shows the mean pixel intensity for 557.5 nm centred on the magnetic zenith. The black arrows show when the heater beam was pointing magnetic field aligned (12° S). The bottom panel shows the CUTLASS radar data averaged over range gates 27 to 40.