PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-19:43:00
G02     34.5           54.7               14.4 +/-    0.47      17.3 +/-    0.47  0.050 / 0.050
G05     143.7          63.5               18.1 +/-    0.56      20.0 +/-    0.56  0.040 / 0.050
G06     56.1           13.2                9.9 +/-    1.20      25.6 +/-    1.20  0.040 / 0.050
G12     194.8          63.2               16.9 +/-    0.68      18.6 +/-    0.68  0.050 / 0.050
G20     198.3          31.0               19.6 +/-    1.59      33.7 +/-    1.59  0.030 / 0.030
G25     284.8          58.9               16.0 +/-    0.84      18.3 +/-    0.84  0.030 / 0.040
G29     311.2          33.0               13.9 +/-    1.56      22.9 +/-    1.56  0.070 / 0.090