PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-18:42:30
G01     239.5          28.3                9.1 +/-    1.76      16.6 +/-    1.76  0.050 / 0.040
G03     310.2          57.3                9.0 +/-    1.59      10.5 +/-    1.59  0.050 / 0.030
G14     71.1           35.0                6.9 +/-    1.68      11.0 +/-    1.68  0.070 / 0.050
G16     158.4          28.5                8.6 +/-    2.04      15.5 +/-    2.04  0.040 / 0.050
G22     274.9          75.2                9.0 +/-    0.62       9.3 +/-    0.62  0.110 / 0.190
G23     295.7          27.3                8.1 +/-    1.96      15.1 +/-    1.96  0.110 / 0.170
G26     123.5          46.9                9.9 +/-    0.60      13.0 +/-    0.60  0.050 / 0.100
G31     40.8           46.7                6.9 +/-    0.93       9.1 +/-    0.93  0.060 / 0.120
G32     87.0           15.5                9.6 +/-    2.49      23.6 +/-    2.49  0.100 / 0.170