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Earth, Planets and Space
Figure 2 | Earth, Planets and Space

Figure 2

From: Patterns of GPS-TEC variation over low-latitude regions (African sector) during the deep solar minimum (2008 to 2009) and solar maximum (2012 to 2013) phases

Figure 2

Comparison of the diurnal hourly VTEC variation over Arba Minch (station number 7) during the solar minimum (2008 to 2009) and solar maximum (2013) phases. The top, the middle, and the bottom panels show the VTEC variation in the sampled days with their corresponding Ap index in 2008, 2009, and 2013, respectively. Arrows indicate the time at which the nighttime enhancement of the VTEC values start.

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