PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-21:12:40
G02     68.3           26.6               10.7 +/-    0.87      20.2 +/-    0.87  0.150 / 0.220
G05     48.9           55.2               12.8 +/-    0.93      15.2 +/-    0.93  0.100 / 0.230
G12     182.4          19.9               17.1 +/-    1.06      37.6 +/-    1.06  0.120 / 0.180
G13     120.1          23.2               15.9 +/-    1.25      32.4 +/-    1.25  0.100 / 0.150
G15     158.3          20.9               18.6 +/-    1.96      39.9 +/-    1.96  0.110 / 0.090
G18     221.8          10.6               -5.5 +/-   10.56     -15.1 +/-   10.56  0.070 / 0.120
G20     216.8          74.5               15.3 +/-    0.52      15.8 +/-    0.52  0.030 / 0.030
G21     280.9          24.9               14.8 +/-    2.53      28.9 +/-    2.53  0.020 / 0.030
G25     217.1          40.4               17.2 +/-    2.14      24.8 +/-    2.14  0.030 / 0.050
G29     339.9          69.1               15.6 +/-    0.33      16.6 +/-    0.33  0.030 / 0.040