PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-12:58:00
G01     249.4          34.4                7.7 +/-    1.00      12.3 +/-    1.00  0.050 / 0.080
G03     315.4          47.8                4.3 +/-    1.46       5.6 +/-    1.46  0.050 / 0.090
G11     237.4          11.6                4.5 +/-    2.18      12.2 +/-    2.18  0.080 / 0.310
G14     58.9           43.1                5.8 +/-    0.39       8.1 +/-    0.39  0.080 / 0.250
G16     161.0          20.7               -6.8 +/-   15.12     -14.8 +/-   15.12  0.100 / 0.780
G18     220.5          26.5                7.2 +/-    1.07      13.5 +/-    1.07  0.100 / 0.570
G23     290.0          24.5                6.6 +/-    1.24      13.1 +/-    1.24  0.080 / 0.180
G26     132.3          40.0                8.8 +/-    0.68      12.7 +/-    0.68  0.110 / 0.180
G31     41.0           54.5                6.0 +/-    0.42       7.2 +/-    0.42  0.080 / 0.040
G32     79.5           20.4                5.3 +/-    0.83      11.6 +/-    0.83  0.070 / 0.040