PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-17:58:00
G01     239.5          28.3                9.8 +/-    2.23      17.7 +/-    2.23  0.040 / 0.040
G03     309.9          57.9                7.3 +/-    0.89       8.4 +/-    0.89  0.040 / 0.030
G14     70.9           35.3                9.3 +/-    0.91      14.7 +/-    0.91  0.100 / 0.160
G16     158.0          28.8               12.7 +/-    1.93      22.8 +/-    1.93  0.130 / 0.140
G22     273.3          75.6                9.4 +/-    1.16       9.7 +/-    1.16  0.040 / 0.050
G23     295.9          27.7                6.5 +/-    1.75      12.0 +/-    1.75  0.040 / 0.060
G26     123.0          46.9               12.1 +/-    1.38      15.9 +/-    1.38  0.060 / 0.130
G31     40.9           46.4                7.5 +/-    0.55       9.9 +/-    0.55  0.050 / 0.130
G32     87.1           15.3                8.9 +/-    1.06      22.0 +/-    1.06  0.040 / 0.040