PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/13-17:57:40
G03     208.7          58.3               13.9 +/-    1.41      16.0 +/-    1.41  0.060 / 0.050
G07     254.9          13.1               14.3 +/-    2.14      37.2 +/-    2.14  0.050 / 0.060
G09     308.7          25.0               10.7 +/-    1.86      20.9 +/-    1.86  0.230 / 0.370
G14     107.1          9.6                12.5 +/-    1.96      35.3 +/-    1.96  0.190 / 0.590
G16     102.4          64.3               13.4 +/-    1.04      14.7 +/-    1.04  0.110 / 0.190
G22     187.0          42.7               12.8 +/-    0.55      17.8 +/-    0.55  0.110 / 0.270
G23     330.5          59.7               10.9 +/-    0.35      12.4 +/-    0.35  0.050 / 0.040
G26     55.3           44.4               13.6 +/-    0.56      18.5 +/-    0.56  0.030 / 0.040
G31     58.2           11.1                9.3 +/-    1.74      25.4 +/-    1.74  0.030 / 0.040