PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-12:58:10
G01     238.1          28.3                6.8 +/-    1.52      12.3 +/-    1.52  0.110 / 0.130
G03     309.2          60.9                4.9 +/-    1.15       5.5 +/-    1.15  0.110 / 0.130
G14     72.2           33.1                7.0 +/-    2.90      11.5 +/-    2.90  0.060 / 0.140
G16     160.1          27.0                6.2 +/-    1.35      11.5 +/-    1.35  0.090 / 0.150
G18     210.8          17.3                3.0 +/-    9.91       7.0 +/-    9.91  0.080 / 0.190
G22     257.6          77.6                6.1 +/-    0.78       6.2 +/-    0.78  0.090 / 0.210
G23     295.6          26.9                7.0 +/-    1.46      13.2 +/-    1.46  0.050 / 0.050
G26     127.4          46.6                8.1 +/-    0.66      10.7 +/-    0.66  0.040 / 0.050
G31     41.0           47.4                5.9 +/-    0.77       7.7 +/-    0.77  0.040 / 0.040
G32     84.8           19.9                5.7 +/-    2.25      12.6 +/-    2.25  0.030 / 0.030