PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/21-10:12:40
G01     93.8           30.9                5.3 +/-    0.91       9.0 +/-    0.91  0.030 / 0.030
G07     122.7          47.4                5.1 +/-    0.69       6.6 +/-    0.69  0.020 / 0.030
G11     70.9           40.3                4.7 +/-    0.35       6.8 +/-    0.35  0.040 / 0.050
G13     297.7          35.3                5.8 +/-    2.19       9.1 +/-    2.19  0.050 / 0.050
G17     211.7          52.2                7.3 +/-    0.62       8.9 +/-    0.62  0.080 / 0.110
G18     65.6           23.7                3.7 +/-    1.07       7.5 +/-    1.07  0.100 / 0.110
G19     213.6          20.1                7.5 +/-    1.87      16.5 +/-    1.87  0.060 / 0.150
G28     340.7          61.8                4.7 +/-    0.73       5.3 +/-    0.73  0.070 / 0.120
G30     85.9           79.4                6.1 +/-    0.54       6.2 +/-    0.54  0.070 / 0.150