PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/30-19:57:40
G02     56.2           36.2               13.5 +/-    0.86      20.9 +/-    0.86  0.250 / 0.470
G05     71.2           68.8               15.3 +/-    0.42      16.3 +/-    0.42  0.190 / 0.500
G12     185.7          35.6               16.5 +/-    1.74      25.8 +/-    1.74  0.040 / 0.080
G13     132.3          12.9               18.5 +/-    1.81      48.3 +/-    1.81  0.030 / 0.090
G20     205.5          57.5               17.6 +/-    0.95      20.5 +/-    0.95  0.060 / 0.060
G21     268.7          16.0               16.5 +/-    3.37      40.1 +/-    3.37  0.040 / 0.080
G25     234.8          53.3               15.3 +/-    1.59      18.5 +/-    1.59  0.070 / 0.100
G29     328.6          54.6               13.2 +/-    0.87      15.8 +/-    0.87  0.070 / 0.090