Fig. 2.From: High latitude TEC fluctuations and irregularity oval during geomagnetic stormsDevelopment of TEC fluctuations at polar stations and IMF B z variations during July 21–28, 2004. The figure shows the time rate change of TEC (TECU/min) along satellite passes over an individual station (ROT). Separation between satellites is 5 TECU.Back to article page