PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/20-19:27:40
G03     209.0          57.2               11.6 +/-    1.07      13.6 +/-    1.07  0.100 / 0.340
G07     256.3          14.4               10.7 +/-    1.59      26.9 +/-    1.59  0.090 / 0.260
G09     309.6          26.4                6.5 +/-    1.95      12.2 +/-    1.95  0.050 / 0.060
G16     99.2           64.9               10.3 +/-    0.70      11.2 +/-    0.70  0.060 / 0.070
G22     187.4          41.6               10.0 +/-    1.44      14.2 +/-    1.44  0.040 / 0.040
G23     331.2          60.5                9.7 +/-    0.90      11.0 +/-    0.90  0.050 / 0.060
G26     54.0           43.5                7.2 +/-    0.57      10.0 +/-    0.57  0.180 / 0.450
G27     133.9          10.4               -8.2 +/-   37.52     -22.6 +/-   37.52  0.180 / 0.340
G31     59.1           10.3                7.4 +/-    5.58      20.4 +/-    5.58  0.110 / 0.210