Figure 6From: Validation of the IRI-2012 model with GPS-based ground observation over a low-latitude Singapore stationVariations of COSMIC-based and IRI-Neq model electron density profiles. (a) Variation of COSMIC-based electron density profile at around 09:00 UT on storm day (25 October 2011) and quiet days of October at around the same time. (b) Variation of IRI-Neq model electron density profile at 09:00 UT on storm day (25 October 2011) and mean estimated during quiet days at the same time in October.Back to article page