PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-17:28:00
G02     36.1           53.3               11.2 +/-    1.39      13.5 +/-    1.39  0.030 / 0.040
G05     142.3          63.7               13.3 +/-    0.22      14.6 +/-    0.22  0.040 / 0.040
G06     55.7           14.2                9.5 +/-    2.15      24.0 +/-    2.15  0.040 / 0.040
G12     196.5          63.9               11.7 +/-    0.41      12.8 +/-    0.41  0.030 / 0.030
G20     198.8          30.3               12.0 +/-    2.05      20.9 +/-    2.05  0.030 / 0.040
G25     287.1          57.8                9.5 +/-    1.11      11.0 +/-    1.11  0.020 / 0.030
G29     312.0          34.4                9.4 +/-    1.15      15.0 +/-    1.15  0.200 / 0.230