PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-13:58:00
G01     219.5          10.9                6.9 +/-    2.58      18.8 +/-    2.58  0.240 / 0.350
G03     242.7          71.8                9.3 +/-    0.93       9.8 +/-    0.93  0.250 / 0.370
G09     298.8          12.3               -1.6 +/-   27.35      -4.2 +/-   27.35  0.340 / 0.430
G14     94.2           18.0                7.2 +/-    1.90      16.7 +/-    1.90  0.150 / 0.250
G16     142.9          51.4               10.3 +/-    1.29      12.8 +/-    1.29  0.040 / 0.040
G22     193.3          59.1               10.9 +/-    0.70      12.5 +/-    0.70  0.030 / 0.040
G23     314.0          43.9                7.0 +/-    1.17       9.6 +/-    1.17  0.110 / 0.280
G26     85.1           55.4                6.1 +/-    1.41       7.2 +/-    1.41  0.110 / 0.280
G31     48.9           25.5                6.9 +/-    1.87      13.4 +/-    1.87  0.030 / 0.050