Prediction of Ionospheric TEC Based on the NARX Neural Network

Table 4

The error statistic of the NARX.

Time period	Station	RMSE/TECU	Regression	Relative error (%)
2011-S	Beijing	1.501	0.956	5.34
	Wuhan	2.501	0.975	7.43
	Sanya	2.655	0.991	6.96
2011-A	Beijing	1.990	0.959	6.79
	Wuhan	2.742	0.977	7.50
	Sanya	3.722	0.988	8.20
2017-S	Beijing	1.049	0.924	6.96
	Wuhan	1.642	0.964	8.11
	Sanya	1.784	0.987	8.88
2017-A	Beijing	1.362	0.925	9.24
	Wuhan	2.068	0.957	9.34
	Sanya	2.728	0.982	10.71