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Table 2. Background TEC, RMSE and normalized RMSE values of GPS TEC and predicted values (NN TEC and IRI-2007 TEC) for different seasons which are March (representing the March equinox), June (representing the June solstice), September (representing the September equinox) and December (representing the December solstice), respectively, in 2007 over Chumphon station.

From: TEC prediction with neural network for equatorial latitude station in Thailand

Month Background TEC (TECU) RMSE (TECU) Normalized RMSE
NN TEC IRI-2007 TEC NN TEC IRI-2007 TEC
March 16.923 1.385 4.025 0.081 0.237
June 12.163 1.107 2.485 0.091 0.204
September 13.639 1.208 3.513 0.088 0.257
December 11.083 1.012 2.135 0.091 0.192