PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-17:57:50
G02     29.2           59.0               15.7 +/-    0.78      18.0 +/-    0.78  0.040 / 0.040
G05     152.9          57.1               18.9 +/-    0.55      22.0 +/-    0.55  0.040 / 0.050
G06     52.2           18.8               12.5 +/-    2.55      28.4 +/-    2.55  0.020 / 0.030
G12     204.5          70.9               15.7 +/-    0.93      16.5 +/-    0.93  0.020 / 0.030
G19     98.7           9.9                16.7 +/-    1.99      46.6 +/-    1.99  0.230 / 0.290
G20     197.8          23.9               18.2 +/-    3.71      36.6 +/-    3.71  0.260 / 0.250
G25     297.8          54.5               15.2 +/-    2.96      18.2 +/-    2.96  0.040 / 0.030
G29     307.0          28.9               14.8 +/-    0.57      26.6 +/-    0.57  0.030 / 0.030