PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/17-20:42:50
G01     227.1          17.7                9.1 +/-    2.58      21.3 +/-    2.58  0.030 / 0.040
G03     286.6          68.3                7.2 +/-    0.72       7.7 +/-    0.72  0.030 / 0.030
G14     85.7           25.2                9.2 +/-    2.15      18.0 +/-    2.15  0.050 / 0.080
G16     150.1          43.3                9.6 +/-    0.92      13.3 +/-    0.92  0.040 / 0.050
G22     217.9          71.4                8.4 +/-    0.66       8.8 +/-    0.66  0.160 / 0.210
G23     306.8          36.9                8.5 +/-    0.77      13.0 +/-    0.77  0.090 / 0.180
G26     100.0          54.2                7.8 +/-    0.42       9.3 +/-    0.42  0.050 / 0.080
G31     44.7           33.5                6.1 +/-    0.88       9.9 +/-    0.88  0.070 / 0.080