PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/19-19:27:10
G02     49.1           42.2                9.0 +/-    1.34      12.6 +/-    1.34  0.020 / 0.040
G05     82.4           68.7               10.4 +/-    0.47      11.1 +/-    0.47  0.030 / 0.040
G12     183.0          40.8               11.5 +/-    0.68      16.6 +/-    0.68  0.040 / 0.040
G25     254.3          57.7               10.6 +/-    1.25      12.2 +/-    1.25  0.040 / 0.050
G29     320.4          43.3                9.5 +/-    1.76      13.1 +/-    1.76  0.050 / 0.060