PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/08-19:27:50
G02     59.0           33.7                7.4 +/-    0.38      12.0 +/-    0.38  0.110 / 0.300
G05     63.7           66.3                9.2 +/-    0.66       9.9 +/-    0.66  0.100 / 0.220
G12     185.3          32.6               10.2 +/-    0.93      16.9 +/-    0.93  0.060 / 0.100
G13     130.1          14.9               13.5 +/-    2.47      33.5 +/-    2.47  0.040 / 0.110
G15     164.3          11.5               14.0 +/-    4.65      37.7 +/-    4.65  0.040 / 0.060
G20     207.2          60.6               10.0 +/-    0.75      11.3 +/-    0.75  0.040 / 0.070
G21     271.2          18.1                8.3 +/-    1.41      19.2 +/-    1.41  0.150 / 0.410
G25     231.1          51.1               10.1 +/-    1.18      12.5 +/-    1.18  0.140 / 0.320
G29     331.1          57.8                7.8 +/-    0.68       9.1 +/-    0.68  0.030 / 0.050