Fig. 5From: Measurement of thermospheric temperatures using OMTI Fabry–Perot interferometers with 70-mm etalonExample of azimuthally integrated fringes (thin lines). This was obtained by a FP02 for 630.0 nm (sky) and b FP02 for 632.8 nm (laser) on December 24, 2010, at Chiang Mai, Thailand. Thick lines indicate the fitting of Eq. (1). The thin vertical dashed lines indicate the intervals of the free spectral ranges used for the fittingBack to article page