PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-10:42:40
G01     129.3          9.7               -17.8 +/-   13.50     -50.0 +/-   13.50  0.180 / 0.220
G07     49.4           68.6                6.3 +/-    1.07       6.8 +/-    1.07  0.150 / 0.250
G08     52.1           40.2                4.5 +/-    1.11       6.5 +/-    1.11  0.040 / 0.030
G09     176.4          37.3                6.7 +/-    1.02      10.1 +/-    1.02  0.030 / 0.030
G11     119.3          32.5                6.1 +/-    0.63      10.2 +/-    0.63  0.030 / 0.030
G17     198.9          14.1                5.9 +/-    3.81      15.1 +/-    3.81  0.030 / 0.030
G23     161.2          12.2                4.7 +/-    1.59      12.5 +/-    1.59  0.040 / 0.050
G28     272.0          51.4                7.2 +/-    2.71       8.9 +/-    2.71  0.040 / 0.040
G30     327.8          56.4                5.1 +/-    0.54       6.0 +/-    0.54  0.110 / 0.260