PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-18:58:00
G02     58.7           33.9               15.4 +/-    0.55      25.0 +/-    0.55  0.040 / 0.110
G05     64.4           66.3               17.3 +/-    0.42      18.7 +/-    0.42  0.060 / 0.090
G12     185.5          33.4               19.4 +/-    1.71      31.7 +/-    1.71  0.040 / 0.060
G13     130.5          14.5               23.5 +/-    1.64      59.1 +/-    1.64  0.050 / 0.060
G15     164.5          11.2               20.2 +/-   34.43      54.9 +/-   34.43  0.110 / 0.270
G20     207.0          59.8               19.5 +/-    0.63      22.2 +/-    0.63  0.110 / 0.300
G21     270.9          17.9               16.5 +/-    2.08      38.3 +/-    2.08  0.030 / 0.030
G25     232.5          51.7               16.3 +/-    0.79      20.2 +/-    0.79  0.030 / 0.040
G29     331.0          57.5               14.2 +/-    0.61      16.6 +/-    0.61  0.030 / 0.050