A comparison of the diurnal and seasonal variations in the ionospheric equivalent slab thickness (tau) and bottomside slab thickness (B0) is presented based on the observation during high solar activities at a mid-latitude station-Wuhan (114.4 degrees E, 30.6 degrees N). The investigated data include foF2, hmF2, B0, B1, and TEC, and are derived from the measured ionogram and GPS receiver over Wuhan from April 1999 to March 2000. The results show that tau and B0 are highly/weakly correlated during the day/night, respectively. Furthermore, a comprehensive discussion of the relation between tau, BO, and hmF2 for geomagnetic storm events is provided in this paper. (C) 2010 Elsevier Ltd. All rights reserved.
JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS