PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/07-06:57:40
G07     314.2          50.2               -6.6 +/-   10.12      -8.2 +/-   10.12  0.030 / 0.050
G08     119.9          44.3               -0.1 +/-    9.90      -0.1 +/-    9.90  0.040 / 0.060
G09     270.5          83.5               -7.8 +/-   10.13      -7.9 +/-   10.13  0.090 / 0.270
G16     42.3           24.2               -4.0 +/-    8.59      -7.9 +/-    8.59  0.090 / 0.400
G23     148.2          60.6               -4.1 +/-   10.55      -4.7 +/-   10.55  0.030 / 0.030
G27     71.7           36.3               -4.3 +/-    9.83      -6.7 +/-    9.83  0.030 / 0.030
G28     226.8          17.2                0.5 +/-    8.93       1.1 +/-    8.93  0.040 / 0.070
G30     289.0          24.2                6.2 +/-    1.93      12.3 +/-    1.93  0.040 / 0.050