PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-21:12:40
G05     47.0           24.7               16.4 +/-    1.48      32.2 +/-    1.48  0.110 / 0.260
G13     82.8           37.5               19.2 +/-    0.44      29.2 +/-    0.44  0.110 / 0.260
G15     130.6          49.4               20.5 +/-    1.00      26.1 +/-    1.00  0.050 / 0.080
G18     242.0          39.0               19.5 +/-    0.96      28.9 +/-    0.96  0.040 / 0.090
G20     25.1           69.6               17.0 +/-    0.47      18.0 +/-    0.47  0.040 / 0.130
G21     309.9          45.4               16.2 +/-    1.17      21.7 +/-    1.17  0.040 / 0.110
G25     198.6          11.8               24.1 +/-    2.83      64.6 +/-    2.83  0.050 / 0.060
G26     294.5          19.4               15.7 +/-    1.10      35.0 +/-    1.10  0.040 / 0.070
G29     150.2          72.7               19.7 +/-    0.56      20.6 +/-    0.56  0.120 / 0.430