PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/23-19:12:30
G02     26.7           60.8               15.2 +/-    0.46      17.2 +/-    0.46  0.020 / 0.040
G05     154.4          55.8               19.9 +/-    0.47      23.5 +/-    0.47  0.030 / 0.040
G06     51.8           19.2               11.1 +/-    1.18      24.8 +/-    1.18  0.030 / 0.060
G12     205.2          71.8               17.3 +/-    0.68      18.1 +/-    0.68  0.040 / 0.060
G19     97.8           10.6               14.9 +/-    1.47      41.1 +/-    1.47  0.030 / 0.040
G20     197.5          23.1               23.2 +/-    1.25      47.4 +/-    1.25  0.030 / 0.050
G25     298.7          54.5               17.0 +/-    1.76      20.4 +/-    1.76  0.040 / 0.130
G29     305.7          27.3               13.8 +/-    1.56      25.6 +/-    1.56  0.060 / 0.100