Fig. 2From: Tomographic imaging of the equatorial and low-latitude ionosphere over central-eastern BrazilTwo-dimensional vertical TEC (in TECU) and the corresponding tomographically reconstructed electron density images (in×1011 electrons/m3) at 45°W during July 01 (2001) and February 25 (2002) at 12 UT, 19 UT and 23 UT .Back to article page