PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/16-21:12:40
G02     62.3           31.5               12.1 +/-    0.91      20.5 +/-    0.91  0.060 / 0.090
G05     55.5           61.7               14.3 +/-    0.54      16.0 +/-    0.54  0.050 / 0.090
G12     183.8          27.0               16.5 +/-    1.39      30.8 +/-    1.39  0.070 / 0.070
G13     126.1          18.3               17.6 +/-    1.91      40.3 +/-    1.91  0.090 / 0.080
G15     162.4          14.8               20.1 +/-    1.22      50.2 +/-    1.22  0.140 / 0.320
G20     209.8          66.6               16.0 +/-    0.78      17.3 +/-    0.78  0.150 / 0.340
G21     274.8          20.5               16.9 +/-    1.25      36.9 +/-    1.25  0.070 / 0.100
G25     223.7          46.8               15.6 +/-    2.86      20.5 +/-    2.86  0.080 / 0.120
G29     333.6          61.6               14.4 +/-    0.35      16.2 +/-    0.35  0.030 / 0.040