PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/09-20:13:00
G02     50.9           40.7                9.6 +/-    0.96      13.9 +/-    0.96  0.020 / 0.020
G05     76.8           67.8               10.1 +/-    0.65      10.8 +/-    0.65  0.030 / 0.020
G12     183.1          39.1               12.5 +/-    0.72      18.5 +/-    0.72  0.140 / 0.330
G21     263.9          10.7               -0.2 +/-   24.09      -0.5 +/-   24.09  0.150 / 0.340
G25     251.0          57.0               11.2 +/-    1.78      13.0 +/-    1.78  0.040 / 0.050
G29     321.6          44.9               10.6 +/-    0.72      14.3 +/-    0.72  0.040 / 0.040