PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-17:42:40
G02     204.4          35.0               12.3 +/-    0.98      19.5 +/-    0.98  0.060 / 0.060
G06     150.9          72.1               10.8 +/-    0.89      11.3 +/-    0.89  0.080 / 0.080
G12     309.6          19.7                8.1 +/-    1.10      18.0 +/-    1.10  0.030 / 0.030
G17     37.6           47.9               10.6 +/-    1.73      13.7 +/-    1.73  0.040 / 0.020
G19     358.2          65.4               10.3 +/-    0.89      11.2 +/-    0.89  0.090 / 0.190
G24     294.7          39.8               10.7 +/-    8.63      15.6 +/-    8.63  0.120 / 0.170
G28     104.2          30.0               10.6 +/-    0.93      18.5 +/-    0.93  0.040 / 0.040