Fig. 9.From: An analysis of the scale height at the F2-layer peak over three middle-latitude stations in the European sectorVariation of the daily hourly values of Hm in km against time, at Pruhonice, for the four seasons of the low solar-activity year 2007: (a) winter, (b) spring, (c) summer and (d) fall and for the four seasons of the low solar-activity year 2007. The corresponding monthly median values and upper and lower quartiles are also plotted.Back to article page