PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-18:58:10
G02     36.2           52.9               10.1 +/-    0.77      12.4 +/-    0.77  0.030 / 0.040
G05     127.7          66.6               12.3 +/-    0.60      13.2 +/-    0.60  0.030 / 0.030
G06     57.8           9.5                 9.2 +/-    2.19      26.0 +/-    2.19  0.040 / 0.050
G12     186.4          57.5               11.7 +/-    0.84      13.5 +/-    0.84  0.030 / 0.060
G25     285.5          57.3               11.1 +/-    0.93      12.9 +/-    0.93  0.160 / 0.320
G29     310.8          31.2                9.1 +/-    1.19      15.6 +/-    1.19  0.090 / 0.320