Table 1.

Comparison of SSA-BP models of different structures.

Errors	Logistic + SSA-BP	Sine + SSA-BP	Tent + SSA-BP
MSE	$7.717\times {10}^{-6}$	$7.543\times {10}^{-7}$	$2.213\times {10}^{-6}$
RMSE	$1.310\times {10}^{-3}$	$8.685\times {10}^{-4}$	$1.488\times {10}^{-3}$
MSE(longitude)	$3.308\times {10}^{-6}$	$1.428\times {10}^{-6}$	$4.325\times {10}^{-6}$
RMSE(longitude)	$1.819\times {10}^{-3}$	$1.195\times {10}^{-3}$	$2.780\times {10}^{-3}$
MSE(latitude)	$1.253\times {10}^{-7}$	$8.041\times {10}^{-8}$	$1.008\times {10}^{-7}$
RMSE(latitude)	$3.540\times {10}^{-4}$	$2.836\times {10}^{-4}$	$3.174\times {10}^{-4}$
MAE(longitude)	$1.319\times {10}^{-3}$	$9.346\times {10}^{-4}$	$1.450\times {10}^{-3}$
MAPE(longitude)	$1.148\times {10}^{-5}$	$8.171\times {10}^{-6}$	$1.261\times {10}^{-5}$
MAE(latitude)	$2.330\times {10}^{-4}$	$1.705\times {10}^{-4}$	$1.996\times {10}^{-4}$
MAPE(latitude)	$7.649\times {10}^{-6}$	$5.600\times {10}^{-6}$	$6.556\times {10}^{-6}$