PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-20:58:00
G02     59.8           33.4               14.2 +/-    0.41      23.1 +/-    0.41  0.050 / 0.060
G05     60.1           64.5               16.8 +/-    0.81      18.4 +/-    0.81  0.050 / 0.060
G12     184.5          30.2               23.2 +/-    1.35      40.4 +/-    1.35  0.110 / 0.280
G13     128.5          16.2               19.1 +/-    0.99      46.0 +/-    0.99  0.100 / 0.340
G15     164.0          12.5               26.4 +/-    3.81      69.7 +/-    3.81  0.030 / 0.110
G20     207.8          63.2               22.0 +/-    0.63      24.3 +/-    0.63  0.050 / 0.110
G21     272.4          18.7               20.8 +/-    3.10      47.4 +/-    3.10  0.030 / 0.050
G25     227.3          49.4               22.8 +/-    1.11      29.0 +/-    1.11  0.040 / 0.040
G29     331.5          58.7               18.9 +/-    0.74      21.7 +/-    0.74  0.030 / 0.040