PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-20:57:50
G05     47.2           23.9               15.2 +/-    0.79      30.5 +/-    0.79  0.100 / 0.270
G13     82.0           37.5               18.6 +/-    0.75      28.2 +/-    0.75  0.090 / 0.280
G15     129.6          49.9               20.4 +/-    1.15      25.8 +/-    1.15  0.040 / 0.080
G18     242.6          39.5               18.8 +/-    2.71      27.5 +/-    2.71  0.050 / 0.090
G20     25.5           69.1               17.9 +/-    0.59      19.0 +/-    0.59  0.170 / 0.350
G21     310.6          45.9               16.6 +/-    1.06      22.0 +/-    1.06  0.240 / 0.440
G25     198.4          11.4               21.1 +/-    4.92      56.9 +/-    4.92  0.040 / 0.100
G26     294.0          19.3               15.7 +/-    1.18      35.0 +/-    1.18  0.050 / 0.130
G29     150.7          71.8               18.6 +/-    0.74      19.4 +/-    0.74  0.080 / 0.110