PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-16:42:50
G02     39.8           49.9               10.1 +/-    1.14      12.8 +/-    1.14  0.050 / 0.040
G05     121.2          69.3               11.7 +/-    0.35      12.5 +/-    0.35  0.040 / 0.040
G12     186.8          53.0               13.0 +/-    1.02      15.8 +/-    1.02  0.030 / 0.030
G25     272.0          59.5               10.3 +/-    1.14      11.8 +/-    1.14  0.020 / 0.020
G29     314.7          36.0               11.5 +/-    1.13      17.9 +/-    1.13  0.050 / 0.040