Fig. 8From: Numerical prediction of sporadic E layer occurrence using GAIAOne-hour values of foEs and VIC120. One-hour values of foEs (blue line) and the vertical ion convergence at 120 km altitude (VIC120) (red line) are plotted for three different periods at Kokubunji in 2009. a corresponds to the most active period, and b, c are moderate and quiet periods, respectivelyBack to article page