PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/11-11:12:40
G01     83.3           33.0                3.2 +/-    0.46       5.3 +/-    0.46  0.040 / 0.090
G07     130.5          39.8                6.5 +/-    1.37       9.5 +/-    1.37  0.040 / 0.060
G11     61.3           36.3                2.5 +/-    0.50       3.9 +/-    0.50  0.030 / 0.030
G13     287.3          37.6                6.5 +/-    1.54       9.9 +/-    1.54  0.030 / 0.030
G17     219.2          60.9                9.5 +/-    0.66      10.8 +/-    0.66  0.060 / 0.120
G18     56.9           21.7                0.2 +/-    1.00       0.5 +/-    1.00  0.060 / 0.090
G19     217.7          28.0                6.0 +/-    0.93      10.9 +/-    0.93  0.060 / 0.130
G28     358.6          61.3                4.4 +/-    0.58       5.0 +/-    0.58  0.050 / 0.110
G30     118.8          73.2                6.0 +/-    0.90       6.3 +/-    0.90  0.060 / 0.180