PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-18:57:40
G02     58.7           33.9               15.9 +/-    1.45      25.7 +/-    1.45  0.050 / 0.070
G05     64.4           66.3               18.0 +/-    0.33      19.4 +/-    0.33  0.050 / 0.060
G12     185.5          33.4               19.0 +/-    1.21      31.1 +/-    1.21  0.060 / 0.100
G13     130.5          14.5               21.5 +/-    4.31      54.1 +/-    4.31  0.070 / 0.120
G15     164.5          11.2               12.7 +/-   40.08      34.4 +/-   40.08  0.030 / 0.030
G20     207.0          59.8               18.6 +/-    0.74      21.1 +/-    0.74  0.030 / 0.030
G21     270.9          17.9               18.2 +/-    2.74      42.1 +/-    2.74  0.040 / 0.040
G25     232.5          51.7               17.9 +/-    2.24      22.1 +/-    2.24  0.040 / 0.040
G29     331.0          57.5               16.3 +/-    0.52      19.0 +/-    0.52  0.050 / 0.050