PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/04-19:27:30
G02     52.9           38.8               19.5 +/-    0.83      29.0 +/-    0.83  0.070 / 0.060
G05     83.2           70.9               22.6 +/-    0.56      23.8 +/-    0.56  0.060 / 0.060
G12     186.7          40.3               20.5 +/-    1.57      29.6 +/-    1.57  0.160 / 0.260
G13     135.5          10.1               -1.2 +/-   29.29      -3.3 +/-   29.29  0.180 / 0.340
G20     203.8          52.7               22.7 +/-    0.70      27.8 +/-    0.70  0.040 / 0.060
G21     265.5          13.5               20.2 +/-    1.43      52.1 +/-    1.43  0.040 / 0.070
G25     242.2          56.1               19.4 +/-    1.94      22.9 +/-    1.94  0.040 / 0.060
G29     325.8          50.9               19.4 +/-    0.94      24.2 +/-    0.94  0.040 / 0.050