PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/27-17:57:40
G02     55.0           36.7               18.0 +/-    0.60      27.7 +/-    0.60  0.100 / 0.090
G05     74.7           68.9               20.0 +/-    0.74      21.2 +/-    0.74  0.090 / 0.070
G12     186.8          38.8               24.9 +/-    1.62      36.9 +/-    1.62  0.100 / 0.350
G13     134.0          11.3               26.0 +/-   33.19      70.4 +/-   33.19  0.110 / 0.330
G20     204.9          54.1               25.6 +/-    1.85      30.8 +/-    1.85  0.050 / 0.060
G21     267.2          15.3               16.6 +/-    1.92      41.0 +/-    1.92  0.040 / 0.050
G25     240.9          55.1               21.7 +/-    0.80      25.8 +/-    0.80  0.030 / 0.030
G29     328.0          53.5               13.1 +/-    1.22      15.8 +/-    1.22  0.030 / 0.040