PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/20-16:28:10
G05     50.4           14.2                7.3 +/-    3.38      18.6 +/-    3.38  0.160 / 0.180
G10     239.3          15.1               11.1 +/-    1.73      27.5 +/-    1.73  0.180 / 0.230
G13     71.2           36.7               10.3 +/-    0.69      15.9 +/-    0.69  0.040 / 0.050
G15     114.2          54.7               11.1 +/-    0.44      13.2 +/-    0.44  0.030 / 0.050
G16     314.8          10.8               -1.3 +/-   15.93      -3.5 +/-   15.93  0.090 / 0.180
G18     251.0          47.2                9.8 +/-    4.39      12.8 +/-    4.39  0.080 / 0.160
G20     29.5           63.7                9.3 +/-    0.56      10.3 +/-    0.56  0.040 / 0.030
G21     321.5          53.4                9.2 +/-    0.62      11.2 +/-    0.62  0.030 / 0.030
G26     286.2          18.9                9.5 +/-    1.98      21.4 +/-    1.98  0.050 / 0.080
G29     155.7          61.0               12.0 +/-    0.62      13.5 +/-    0.62  0.050 / 0.080