PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-17:12:00
G02     43.0           47.4                6.9 +/-    1.15       9.1 +/-    1.15  0.050 / 0.060
G05     107.9          70.6                8.8 +/-    0.75       9.2 +/-    0.75  0.060 / 0.050
G12     185.5          48.5               10.8 +/-    0.48      13.8 +/-    0.48  0.030 / 0.030
G25     264.0          59.3                8.1 +/-    0.92       9.2 +/-    0.92  0.030 / 0.030
G29     317.2          39.0                7.1 +/-    0.58      10.5 +/-    0.58  0.040 / 0.050