Real-Time Modeling of Regional Tropospheric Delay Based on Multicore Support Vector Machine

Table 4

Fitting and forecast accuracy statistical results of the five model for five consecutive days of real-time ZTD modeling, with real-time ZTD as the true value.

Modeling method	Bias^observ (mm)			Bias^true (mm)			STD (mm)			RMSE (mm)
	HKQT	HKSL	HKNP	HKCL	HKWS	HKST	HKQT	HKSL	HKNP	HKCL	HKWS	HKST
FP	2.69	−0.17	2.08	5.30	−0.27	2.63	2.02	1.06	0.98	8.20	1.13	1.80
BP	2.40	−0.36	1.16	4.73	−0.77	2.48	1.78	1.12	1.27	8.19	1.40	2.03
SVM	3.15	0.04	2.01	6.30	−0.78	1.69	1.90	0.85	0.89	8.05	0.64	1.39
SUM	2.74	−0.10	1.72	5.30	−0.68	2.26	1.82	0.85	0.87	8.09	0.78	1.60
MS	0.32	0.05	0.48	5.31	−0.23	1.61	0.28	0.45	0.22	8.21	1.11	1.14
Mean	2.26	−0.11	1.49	5.39	−0.55	2.13	1.56	0.87	0.85	8.15	1.01	1.59