PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/11-14:58:00
G01     60.8           30.5                7.2 +/-    1.11      12.5 +/-    1.11  0.070 / 0.160
G06     180.4          14.4                9.9 +/-    3.57      24.9 +/-    3.57  0.080 / 0.220
G07     141.6          20.0                6.3 +/-    2.84      13.8 +/-    2.84  0.080 / 0.130
G11     47.8           21.7                6.6 +/-    2.53      14.0 +/-    2.53  0.110 / 0.130
G13     265.9          35.1               10.1 +/-    2.86      16.1 +/-    2.86  0.040 / 0.040
G15     297.4          15.5                7.5 +/-    1.43      18.4 +/-    1.43  0.030 / 0.030
G17     263.6          78.3                9.1 +/-    0.56       9.3 +/-    0.56  0.140 / 0.200
G19     232.4          52.2               11.7 +/-    2.07      14.4 +/-    2.07  0.090 / 0.220
G28     34.7           56.8               10.3 +/-    1.37      12.1 +/-    1.37  0.050 / 0.060
G30     142.8          55.4                8.6 +/-    0.71      10.2 +/-    0.71  0.050 / 0.070