PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-08:43:10
G07     314.6          50.6                4.3 +/-    0.66       5.4 +/-    0.66  0.030 / 0.040
G08     119.7          44.2                8.8 +/-    0.68      12.0 +/-    0.68  0.030 / 0.040
G09     262.3          84.3                5.7 +/-    0.48       5.7 +/-    0.48  0.030 / 0.050
G16     42.3           23.1                3.0 +/-    2.16       6.2 +/-    2.16  0.030 / 0.050
G23     148.0          60.8                8.6 +/-    0.40       9.7 +/-    0.40  0.140 / 0.110
G27     71.9           36.3                5.1 +/-    0.94       7.9 +/-    0.94  0.100 / 0.130
G28     226.7          17.0                4.7 +/-   10.25      11.2 +/-   10.25  0.110 / 0.190
G30     288.5          23.6                5.2 +/-    1.32      10.6 +/-    1.32  0.080 / 0.160