PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/28-08:28:00
G01     126.7          11.8                2.5 +/-   18.73       6.6 +/-   18.73  0.040 / 0.040
G07     56.3           69.1                1.9 +/-    7.97       2.0 +/-    7.97  0.050 / 0.040
G08     49.1           37.3               -1.0 +/-   14.49      -1.5 +/-   14.49  0.090 / 0.370
G09     174.1          30.6                3.4 +/-   20.07       5.8 +/-   20.07  0.090 / 0.370
G11     116.3          35.8                4.8 +/-    6.06       7.5 +/-    6.06  0.040 / 0.030
G13     320.9          12.3               -3.3 +/-   13.50      -8.7 +/-   13.50  0.080 / 0.080
G17     199.2          16.9                2.9 +/-   17.19       6.9 +/-   17.19  0.110 / 0.450
G18     101.8          16.8                3.9 +/-   12.29       9.4 +/-   12.29  0.100 / 0.360
G28     275.6          52.3                2.6 +/-   20.75       3.2 +/-   20.75  0.100 / 0.290
G30     331.1          59.6               -0.5 +/-   13.59      -0.6 +/-   13.59  0.130 / 0.260