Fig. 9From: The science case for the EISCAT_3D radarEISCAT data showing the suppression of PMSE layers (left) and PMWE layers (right) by ionospheric heating, which may give clues to the composition of these layers. The left-hand panel shows data first reported by Chilson et al. (2000). The right-hand panel is taken from Kavanagh et al. (2006)Back to article page