PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/15-19:28:10
G02     43.3           47.0                9.6 +/-    0.96      12.7 +/-    0.96  0.030 / 0.030
G05     104.1          69.6               10.8 +/-    0.84      11.5 +/-    0.84  0.030 / 0.030
G12     184.4          48.6               13.0 +/-    0.68      16.6 +/-    0.68  0.040 / 0.050
G25     269.1          58.9               11.0 +/-    2.83      12.7 +/-    2.83  0.050 / 0.040
G29     316.0          37.5                9.1 +/-    1.04      13.8 +/-    1.04  0.030 / 0.060