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Temporal and spatial variations in ionospheric electron density profiles over South Africa during strong magnetic storms

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Figure

Fig. 1. Solar and geomagnetic field parameters on 13 and20 May 2005. The satellite records of interplanetary magnetic fieldstrength, the Bz component of the interplanetary magnetic field, and
Fig. 2.Figure 2 Distribution of TrigNet sites. When CIT technology is used to inverse the temporal and spatial variations in ionospheric  Distribution of TrigNet sites.
Fig. 3. Electron density at different altitudes at 10:00 UT (13:00 LT)on (a) 14, (b) 15 May 2005 (unit: 1011 el m−3).
Figure 4Fig. 4. Map of the electron density changes at an altitude of 350 km from 04:00UT on 14 May to 20:00UT on 15 May(unit:  Continued.
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