PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-19:27:30
G02     63.4           30.0               16.8 +/-    0.70      29.5 +/-    0.70  0.060 / 0.100
G05     55.0           61.5               17.7 +/-    0.60      19.9 +/-    0.60  0.060 / 0.120
G12     184.2          27.0               19.8 +/-    1.21      36.9 +/-    1.21  0.080 / 0.330
G13     125.8          18.7               21.1 +/-    1.96      48.1 +/-    1.96  0.090 / 0.270
G15     161.3          15.8               26.0 +/-    2.15      63.3 +/-    2.15  0.040 / 0.060
G20     210.7          66.6               19.8 +/-    1.14      21.4 +/-    1.14  0.050 / 0.090
G21     275.7          21.5               16.0 +/-    1.77      33.9 +/-    1.77  0.110 / 0.520
G25     224.8          46.7               19.7 +/-    1.11      25.9 +/-    1.11  0.110 / 0.460
G29     335.5          63.3               18.1 +/-    0.77      20.0 +/-    0.77  0.040 / 0.040