Analyzing the Impact of Climate Factors on GNSS-Derived Displacements by Combining the Extended Helmert Transformation and XGboost Machine Learning Algorithm
Table 1
Detailed information of the ten reference stations and the site velocities referred to IGS14 and PRVI19 reference frames.
Reference GNSS
Location (degree)
Site velocity
Uncertainty of the velocity (mm/year)
IGS14, mm/year
PRVI19, mm/year
Location
Longitude
Latitude
EW
NS
UD
EW
NS
UD
EW
NS
UD
P780
Ponce, PR
-66.5791
18.075
8.9
13.8
-0.3
0.1
0.1
-0.3
0.2
0.2
0.8
BYSP
Bayamón, PR
-66.1612
18.408
8.8
13.8
-0.5
0.2
-0.2
-0.9
0.2
0.2
0.8
PRJC
San Sebastian, PR
-66.9995
18.342
9.0
13.6
-0.8
0.4
0.1
-0.9
0.3
0.3
1.0
PRLP
Las Piedras, PR
-65.8683
18.195
9.3
14.8
0.1
0.5
0.7
-0.1
0.3
0.3
1.0
PRAR
Cercadillo, PR
-66.647
18.450
8.9
14.4
-0.5
0.3
0.7
-0.9
0.3
0.3
0.9
PRN4
Coamo, PR
-66.369
18.079
9.0
13.6
0.6
0.2
-0.3
0.6
0.3
0.3
1.1
CUPR
Culebra Island, PR
-65.2825
18.307
8.5
14.6
-0.5
-0.3
0.2
-0.9
0.3
0.3
1.0
VITH
St. Thomas Island, USVI
-64.9692
18.343
8.6
14.8
-0.1
-0.1
0.2
-0.5
0.2
0.3
0.9
CN03
Gorda Peak, BVI
-64.403
18.490
8.9
15.5
-0.2
0.2
0.6
-0.5
0.4
0.4
1.3
ABVI
Anegada Island, BVI
-64.3325
13.730
8.4
14.9
-0.3
-0.2
-0.1
-0.9
0.3
0.3
1.0
PR: Puerto Rico; USVI: U.S. Virgin Islands; BVI: British Virgin Islands. The uncertainty represents the 95% confidence interval of the velocity estimate.
