PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/12-17:57:20
G02     51.1           41.0                9.1 +/-    0.88      13.0 +/-    0.88  0.030 / 0.040
G05     75.8           68.6                9.0 +/-    0.58       9.5 +/-    0.58  0.030 / 0.030
G12     183.4          37.7               11.1 +/-    1.82      16.8 +/-    1.82  0.040 / 0.070
G13     133.2          10.5               -4.0 +/-   27.90     -11.0 +/-   27.90  0.040 / 0.060
G21     265.8          12.8               11.1 +/-    2.97      29.2 +/-    2.97  0.060 / 0.070
G25     244.8          56.1                9.8 +/-    0.64      11.5 +/-    0.64  0.060 / 0.080
G29     323.3          47.2                9.4 +/-    1.04      12.3 +/-    1.04  0.180 / 0.470