PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/30-12:13:10
G02     202.5          23.3                4.0 +/-    1.08       8.2 +/-    1.08  0.180 / 0.260
G06     166.0          61.2                7.3 +/-    0.52       8.3 +/-    0.52  0.220 / 0.280
G12     303.7          11.7               -0.2 +/-   10.78      -0.6 +/-   10.78  0.110 / 0.350
G17     30.3           53.7                4.4 +/-    0.56       5.4 +/-    0.56  0.100 / 0.280
G19     327.5          69.4                4.3 +/-    0.67       4.5 +/-    0.67  0.060 / 0.090
G24     303.5          35.9                2.6 +/-    0.88       4.1 +/-    0.88  0.060 / 0.110
G28     93.7           37.1                4.1 +/-    0.61       6.2 +/-    0.61  0.030 / 0.040
G30     158.2          10.6                4.2 +/-    3.87      11.6 +/-    3.87  0.040 / 0.040