PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-17:58:10
G02     36.7           52.7               16.8 +/-    0.71      20.5 +/-    0.71  0.030 / 0.050
G05     141.3          64.5               19.9 +/-    1.02      21.9 +/-    1.02  0.030 / 0.050
G06     56.4           13.2               12.0 +/-    1.35      31.2 +/-    1.35  0.040 / 0.060
G12     195.3          62.6               15.5 +/-    1.12      17.2 +/-    1.12  0.040 / 0.040
G20     198.8          31.6               20.9 +/-    1.99      35.5 +/-    1.99  0.030 / 0.040
G25     284.6          58.4               17.6 +/-    1.06      20.3 +/-    1.06  0.040 / 0.040
G29     312.6          34.9               14.6 +/-    1.72      23.3 +/-    1.72  0.060 / 0.110