PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-19:13:00
G02     58.1           34.4               16.7 +/-    0.37      26.7 +/-    0.37  0.060 / 0.110
G05     66.0           67.0               18.7 +/-    0.70      20.1 +/-    0.70  0.030 / 0.100
G12     185.6          34.0               19.1 +/-    1.63      31.0 +/-    1.63  0.100 / 0.360
G13     131.0          14.1               22.4 +/-    1.97      56.9 +/-    1.97  0.110 / 0.370
G15     164.9          10.6                9.0 +/-   47.63      24.9 +/-   47.63  0.040 / 0.060
G20     206.6          59.2               20.2 +/-    0.56      23.1 +/-    0.56  0.050 / 0.060
G21     270.3          17.4               16.0 +/-    3.89      37.6 +/-    3.89  0.120 / 0.450
G25     233.1          52.1               17.2 +/-    0.94      21.1 +/-    0.94  0.130 / 0.470
G29     330.4          56.8               15.3 +/-    0.95      18.0 +/-    0.95  0.030 / 0.040