Fig. 6From: Geomagnetically conjugate observations of ionospheric and thermospheric variations accompanied by a midnight brightness wave at low latitudesThe 630-nm a meridional and b zonal keograms represented as raw CCD counts, c \(h'F\) and d \(f_{\mathrm{o}}F_2\) observed by an ionosonde, at Chiang Mai on February 7, 2011Back to article page