PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/07-21:27:50
G02     54.0           38.5               11.3 +/-    0.47      16.8 +/-    0.47  0.040 / 0.090
G05     73.2           68.6               10.9 +/-    0.61      11.6 +/-    0.61  0.040 / 0.100
G12     185.5          37.0               12.2 +/-    1.85      18.7 +/-    1.85  0.040 / 0.060
G13     133.5          11.8               14.2 +/-    2.45      38.0 +/-    2.45  0.040 / 0.070
G20     204.3          56.0               13.0 +/-    0.97      15.3 +/-    0.97  0.120 / 0.340
G21     267.1          14.4               11.2 +/-    2.39      28.4 +/-    2.39  0.110 / 0.330
G25     235.5          54.4               11.6 +/-    0.92      13.9 +/-    0.92  0.030 / 0.060
G29     326.5          52.0               10.0 +/-    1.16      12.3 +/-    1.16  0.040 / 0.050