PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/25-21:12:50
G02     50.7           40.6                6.9 +/-    0.48       9.9 +/-    0.48  0.030 / 0.040
G05     77.7           67.8                7.5 +/-    0.69       8.0 +/-    0.69  0.030 / 0.040
G12     183.8          40.3                9.0 +/-    1.43      13.1 +/-    1.43  0.090 / 0.090
G21     263.5          10.5               -1.3 +/-   20.72      -3.5 +/-   20.72  0.040 / 0.080
G25     252.7          57.2                6.4 +/-    0.85       7.5 +/-    0.85  0.050 / 0.090
G29     321.3          44.5                7.0 +/-    1.07       9.5 +/-    1.07  0.050 / 0.080