Fig. 7.From: TEC prediction with neural network for equatorial latitude station in Thailand(a–d) GPS TEC, NN TEC and IRI-2007 TEC at Chumphon station (a) on 20 March 2007 (equinox day), (b) on 21 June 2007 (solstice day), (c) on 23 September 2007 (equinox day), (d) on 25 December 2007 (solstice day).Back to article page