PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-17:57:40
G01     239.5          28.3               10.2 +/-    1.49      18.4 +/-    1.49  0.040 / 0.030
G03     309.9          57.9               10.1 +/-    1.59      11.7 +/-    1.59  0.040 / 0.030
G14     70.9           35.3                9.5 +/-    1.14      15.0 +/-    1.14  0.110 / 0.160
G16     158.0          28.8               10.4 +/-    1.51      18.7 +/-    1.51  0.110 / 0.130
G22     273.3          75.6                9.7 +/-    0.47       9.9 +/-    0.47  0.040 / 0.050
G23     295.9          27.7                8.2 +/-    1.10      15.1 +/-    1.10  0.060 / 0.050
G26     123.0          46.9               12.0 +/-    0.39      15.7 +/-    0.39  0.050 / 0.090
G31     40.9           46.4                7.9 +/-    0.84      10.4 +/-    0.84  0.070 / 0.100
G32     87.1           15.3               10.5 +/-    2.35      26.0 +/-    2.35  0.070 / 0.030