PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/08-12:12:30
G01     88.3           32.0                2.0 +/-    0.80       3.4 +/-    0.80  0.030 / 0.070
G07     126.9          41.8                1.8 +/-    1.23       2.5 +/-    1.23  0.030 / 0.060
G11     65.8           37.1                0.8 +/-    0.40       1.2 +/-    0.40  0.030 / 0.030
G13     295.3          35.0                1.3 +/-    0.99       2.0 +/-    0.99  0.020 / 0.030
G17     215.3          57.6                0.9 +/-    0.82       1.0 +/-    0.82  0.080 / 0.100
G19     215.1          30.1                3.7 +/-    1.10       6.5 +/-    1.10  0.080 / 0.110
G28     352.5          61.5                0.8 +/-    1.04       0.9 +/-    1.04  0.030 / 0.040
G30     103.7          76.5                1.4 +/-    0.93       1.4 +/-    0.93  0.030 / 0.050