PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-19:27:40
G02     63.4           30.0               16.4 +/-    1.43      28.7 +/-    1.43  0.120 / 0.080
G05     55.0           61.5               18.3 +/-    0.37      20.6 +/-    0.37  0.100 / 0.090
G12     184.2          27.0               17.2 +/-    1.05      32.2 +/-    1.05  0.140 / 0.360
G13     125.8          18.7               20.8 +/-    1.61      47.3 +/-    1.61  0.190 / 0.330
G15     161.3          15.8               22.3 +/-    1.86      54.3 +/-    1.86  0.090 / 0.090
G20     210.7          66.6               19.7 +/-    1.13      21.2 +/-    1.13  0.070 / 0.140
G21     275.7          21.5               17.9 +/-    2.22      37.9 +/-    2.22  0.040 / 0.040
G25     224.8          46.7               18.6 +/-    2.52      24.5 +/-    2.52  0.040 / 0.030
G29     335.5          63.3               17.8 +/-    0.38      19.7 +/-    0.38  0.040 / 0.030