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

Table 2

ZTD fitting and forecast accuracy statistics results of five consecutive days for the five models.

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	0.43	0.88	1.43	10.93	−0.47	2.21	4.17	2.96	2.18	15.51	2.99	4.12
BP	1.14	−0.26	0.98	10.31	−0.56	1.60	2.93	1.59	1.76	15.46	2.82	4.88
SVM	1.69	0.00	1.45	11.09	−0.60	1.67	3.60	1.90	1.96	15.63	3.19	3.98
SUM	1.06	0.12	1.27	10.77	−0.59	1.95	3.30	1.72	1.76	15.41	2.62	3.97
MS	0.14	0.06	0.28	10.79	−0.29	1.27	1.05	1.12	0.97	15.47	2.68	2.44
Mean	0.89	0.16	1.08	10.78	−0.50	1.74	3.01	1.86	1.73	15.49	2.86	3.88