PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-08:27:30
G02     201.7          32.9                5.7 +/-    0.55       9.4 +/-    0.55  0.040 / 0.120
G06     173.0          61.9                5.8 +/-    0.76       6.5 +/-    0.76  0.060 / 0.120
G12     305.6          11.6                0.4 +/-   12.25       1.1 +/-   12.25  0.050 / 0.110
G17     34.3           50.7                0.6 +/-    0.62       0.7 +/-    0.62  0.050 / 0.090
G19     358.0          66.4                0.5 +/-    0.39       0.6 +/-    0.39  0.030 / 0.040
G24     302.4          35.5                2.0 +/-    0.75       3.1 +/-    0.75  0.020 / 0.040
G28     100.0          32.5                4.5 +/-    1.23       7.4 +/-    1.23  0.120 / 0.310