PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-13:43:00
G01     74.5           33.0                7.2 +/-    0.73      11.9 +/-    0.73  0.110 / 0.300
G07     135.3          31.2                9.0 +/-    0.51      15.3 +/-    0.51  0.120 / 0.300
G11     55.1           30.5                6.7 +/-    1.47      11.7 +/-    1.47  0.060 / 0.100
G13     281.2          36.9                7.5 +/-    0.85      11.6 +/-    0.85  0.260 / 0.180
G15     307.5          13.5                3.7 +/-    1.23       9.6 +/-    1.23  0.030 / 0.030
G17     228.8          68.9                8.0 +/-    0.77       8.5 +/-    0.77  0.030 / 0.030
G19     221.9          40.9                9.0 +/-    0.78      12.9 +/-    0.78  0.040 / 0.040
G28     14.0           59.8                5.2 +/-    0.53       6.0 +/-    0.53  0.030 / 0.040
G30     130.1          67.1                7.1 +/-    0.87       7.6 +/-    0.87  0.080 / 0.140