Fig. 5From: Tristatic observation of polar mesosphere winter echoes with the EISCAT VHF radar on 8 January 2014: a case studyTime–altitude plot of fitted spectral amplitude (a), exponent (b), full spectral width (c) and vertical velocity (d) for Tromsø. The (almost) vertical lines at 11:44, 11:46, 12:02, 12:14 and 12:40 UT indicate range aliased echoes of space debrisBack to article page