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

Table 5

Statistical results of static and simulated dynamic PPP positioning results of all stations in four schemes and accuracy comparison between different schemes.

Station	Scheme 1	Scheme 2	Scheme 3	Scheme 4
	P (cm)/T (min)	P (cm)/T (min)	P (cm)/T (min)	P (cm)/T (min)
HKQT	1.29/4.53/2.29/5.50/31.50/23.50	1.73/4.27/2.23/3.50/29.00/24.00	1.48/3.17/4.22/6.00/44.00/11.50	2.61/2.36/2.64/4.00/42.50/24.50
HKSL	1.66/7.64/1.69/8.50/13.00/14.00	1.95/5.94/1.67/4.50/12.50/4.00	1.78/2.87/2.92/10.00/32.00/6.50	3.00/3.05/2.18/4.50/27.50/8.50
HKNP	4.31/5.62/2.00/8.50/17.50/16.00	1.71/4.11/1.94/8.50/19.50/10.50	4.76/3.10/5.42/8.50/27.00/9.50	1.33/2.83/2.36/8.50/30.50/4.00
HKCL	5.99/5.33/9.74/5.50/23.00/24.00	6.11/4.98/9.41/8.50/23.00/18.50	6.15/8.60/9.10/6.00/35.50/29.50	6.18/8.55/9.02/6.50/32.50/14.50
HKWS	2.07/3.57/2.19/16.50/8.50/20.00	1.99/2.81/2.02/4.00/8.00/4.00	2.12/3.65/3.01/18.50/32.00/27.50	2.73/3.04/1.56/4.50/32.50/17.50
HKST	1.36/4.71/1.29/27.50/75.50/23.50	0.34/3.51/1.76/10.00/51.00/19.00	0.70/1.56/1.64/31.00/51.00/28.00	0.66/2.26/1.36/14.50/38.00/23.00
Average	2.78/5.23/3.20/12.00/28.17/20.17	2.31/4.27/3.17/6.50/23.83/13.33	2.83/3.83/4.39/13.33/36.92/18.75	2.75/3.68/3.19/7.08/33.92/15.33
Improvement rate	—/—/—/—/—/—	17.09/18.41/0.89/45.83/15.38/33.88	—/—/—/—/—/—	2.83/3.75/27.33/46.88/8.13/18.22

Note. P and T are the positioning precision and the convergence time in N, E, and U components, respectively. Improvement rate describes the improvement effect of the PPP solution with ZTD constraint compared with the solution without constraint, in unit of %.