Fig. 4From: Tomographic imaging of the equatorial and low-latitude ionosphere over central-eastern BrazilComparison of NmF2 derived from ionosonde measurements (line with blanket circles), MIDAS’ tomographic reconstructions (line with filled squares) and IRI-2007 model estimations (line with asterisks) during all seasons. Top: equatorial station of SL. Middle: equatorial station of FZ. Bottom: low-latitude station of CP.Back to article page