Fig. 10
From: Post-sunset rise of equatorial F layer—or upwelling growth?
Curves of h’F(2.5) vs UT, for two quiet nights (20 and 22 March 2006), and one disturbed night (27 March 2006). The green (red) curve is for BCL (CPN). The gray curve is h’F(2.5) vs LST for CPN. Two levels for range type of ESF are shown, weak and strong; they should be used with the UT scale. Mean SSN for 2006 was 15.2