PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/11-14:57:50
G01     60.8           30.5                7.8 +/-    1.04      13.6 +/-    1.04  0.060 / 0.170
G06     180.4          14.4                9.1 +/-    2.83      23.0 +/-    2.83  0.090 / 0.160
G07     141.6          20.0                8.0 +/-    0.60      17.6 +/-    0.60  0.070 / 0.130
G11     47.8           21.7                6.3 +/-    0.90      13.3 +/-    0.90  0.070 / 0.150
G13     265.9          35.1               10.7 +/-    0.96      17.0 +/-    0.96  0.040 / 0.050
G15     297.4          15.5                8.5 +/-    2.65      20.8 +/-    2.65  0.030 / 0.040
G17     263.6          78.3               10.1 +/-    0.57      10.3 +/-    0.57  0.020 / 0.030
G19     232.4          52.2               12.7 +/-    0.88      15.6 +/-    0.88  0.030 / 0.040
G28     34.7           56.8                8.6 +/-    0.87      10.0 +/-    0.87  0.060 / 0.090
G30     142.8          55.4                9.6 +/-    0.75      11.4 +/-    0.75  0.050 / 0.090