PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/18-17:42:50
G02     54.9           37.8                7.5 +/-    0.59      11.3 +/-    0.59  0.030 / 0.030
G05     66.1           66.2                7.6 +/-    0.31       8.2 +/-    0.31  0.030 / 0.040
G12     182.9          33.4               11.1 +/-    0.92      18.2 +/-    0.92  0.100 / 0.390
G13     130.0          13.3               10.2 +/-    2.35      26.4 +/-    2.35  0.150 / 0.420
G21     269.1          15.5                8.3 +/-    2.41      20.5 +/-    2.41  0.050 / 0.110
G25     237.2          53.5                8.1 +/-    1.23       9.8 +/-    1.23  0.040 / 0.100
G29     326.1          51.1                7.0 +/-    0.67       8.8 +/-    0.67  0.080 / 0.450