PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/29-21:42:50
G05     46.1           27.6               13.3 +/-    1.08      24.5 +/-    1.08  0.210 / 0.390
G13     86.8           37.1               18.5 +/-    1.09      28.2 +/-    1.09  0.220 / 0.350
G15     135.0          46.9               20.4 +/-    0.40      26.8 +/-    0.40  0.100 / 0.180
G18     239.3          36.2               18.4 +/-    1.70      28.5 +/-    1.70  0.090 / 0.220
G20     22.1           72.4               17.5 +/-    0.83      18.2 +/-    0.83  0.060 / 0.090
G21     306.9          43.2               16.1 +/-    0.68      22.3 +/-    0.68  0.060 / 0.100
G25     199.8          14.1               21.2 +/-    3.15      53.9 +/-    3.15  0.040 / 0.040
G26     297.2          19.3               15.7 +/-    1.48      35.2 +/-    1.48  0.040 / 0.030
G29     146.3          76.5               18.4 +/-    0.83      18.9 +/-    0.83  0.070 / 0.140