PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-18:43:10
G02     75.8           19.8               14.5 +/-    1.15      32.0 +/-    1.15  0.050 / 0.290
G05     45.3           46.0               13.8 +/-    0.46      18.4 +/-    0.46  0.050 / 0.360
G12     181.1          12.9               19.5 +/-    1.63      51.0 +/-    1.63  0.080 / 0.140
G13     112.2          28.4               18.0 +/-    1.42      32.7 +/-    1.42  0.100 / 0.170
G15     152.0          28.9               20.1 +/-    1.10      36.0 +/-    1.10  0.090 / 0.120
G18     225.5          18.8               20.1 +/-    4.07      45.4 +/-    4.07  0.080 / 0.130
G20     237.8          82.1               16.2 +/-    0.60      16.3 +/-    0.60  0.030 / 0.050
G21     288.6          31.0               14.9 +/-    1.45      25.6 +/-    1.45  0.030 / 0.050
G25     213.0          33.6               19.5 +/-    1.27      31.8 +/-    1.27  0.080 / 0.190
G29     358.1          79.3               16.3 +/-    0.77      16.5 +/-    0.77  0.080 / 0.200