Fig. 3From: Response of the total electron content at Brazilian low latitudes to corotating interaction region and high-speed streams during solar minimum 2008Diurnal (top panel) and nocturnal (bottom panel) annual VTEC variation and Gapped Wavelet Spectra in 2008. Left panel: quasi-equatorial region, Sao Luis, SALU. Right panel: Cachoeria Paulista, CPBack to article page