PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-13:27:50
G01     61.1           30.9                6.5 +/-    0.99      11.1 +/-    0.99  0.040 / 0.040
G07     141.8          23.0                7.4 +/-    2.84      15.1 +/-    2.84  0.040 / 0.050
G11     48.1           23.3                6.3 +/-    2.14      12.8 +/-    2.14  0.100 / 0.110
G13     263.3          35.7                6.9 +/-    1.84      10.9 +/-    1.84  0.070 / 0.130
G15     298.2          14.8                2.1 +/-    1.85       5.3 +/-    1.85  0.070 / 0.120
G17     259.2          77.3                7.5 +/-    0.29       7.6 +/-    0.29  0.070 / 0.100
G18     42.5           13.0                5.3 +/-    2.02      13.8 +/-    2.02  0.040 / 0.090
G19     230.9          46.1                7.5 +/-    2.24      10.0 +/-    2.24  0.050 / 0.080
G28     33.7           57.1                6.4 +/-    0.96       7.5 +/-    0.96  0.180 / 0.180
G30     143.4          55.1                7.8 +/-    1.11       9.3 +/-    1.11  0.190 / 0.360