BDS-3 Broadcast Ephemeris Orbit Correction Model Based on Improved PSO Combined with BP Neural Network

Table 4

C20 broadcast ephemeris orbit error-correction table.

Model	x			y			z
	Mean/m	STD/m	RMS/m	Mean/m	STD/m	RMS/m	Mean/m	STD/m	RMS/m
Real	0.735	0.854	0.848	0.671	0.799	0.793	0.674	0.778	0.772
BPNN	0.486	0.564	0.560	0.445	0.536	0.532	0.429	0.499	0.496
PSO-BPNN	0.228	0.279	0.277	0.205	0.254	0.252	0.200	0.247	0.245
IPSO-BPNN	0.172	0.215	0.213	0.187	0.232	0.230	0.158	0.195	0.193
LSTM	0.649	0.782	0.777	0.537	0.650	0.645	0.571	0.669	0.664