Fig. 10
From: Measurement of thermospheric temperatures using OMTI Fabry–Perot interferometers with 70-mm etalon
Relation between temperatures (crosses) obtained by FPIs and universal time. This was obtained at a, e Tromsø for October 11, 2009–May 24, 2013, b, f Chiang Mai for May 2, 2010–September 14, 2013, c, g Kototabang for June 11, 2010–December 31, 2013 and d, h Darwin for April 6, 2011–November 3, 2013. Left panels (a–d) and right (e–h) panels indicate original temperatures and the temperatures without the data when the airglow intensity is very low, respectively. Dashed lines indicate local midnight