PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/12-08:13:10
G07     331.5          57.5                4.4 +/-    0.62       5.1 +/-    0.62  0.030 / 0.080
G08     98.8           51.0                7.4 +/-    0.39       9.2 +/-    0.39  0.040 / 0.090
G09     179.9          71.3                5.0 +/-    0.88       5.3 +/-    0.88  0.090 / 0.100
G11     145.7          12.7                6.2 +/-    3.24      16.4 +/-    3.24  0.080 / 0.120
G23     155.4          44.2                7.2 +/-    0.92       9.7 +/-    0.92  0.030 / 0.050
G27     57.5           33.3                4.1 +/-    0.63       6.8 +/-    0.63  0.030 / 0.050
G28     235.8          27.4                7.3 +/-    2.94      13.6 +/-    2.94  0.040 / 0.050
G30     299.8          32.7                4.2 +/-    1.46       6.9 +/-    1.46  0.030 / 0.050