PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-17:13:10
G02     38.7           50.8                7.8 +/-    0.52       9.7 +/-    0.52  0.040 / 0.040
G05     122.1          68.9                8.9 +/-    0.41       9.4 +/-    0.41  0.030 / 0.040
G12     186.6          53.6               10.6 +/-    1.43      12.9 +/-    1.43  0.040 / 0.050
G25     274.3          59.2                9.2 +/-    1.47      10.5 +/-    1.47  0.040 / 0.050
G29     314.1          35.2                7.7 +/-    1.51      12.2 +/-    1.51  0.040 / 0.050