PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/13-18:27:30
G03     237.1          69.1               10.8 +/-    0.34      11.5 +/-    0.34  0.040 / 0.040
G09     302.5          17.2               10.2 +/-    2.20      24.1 +/-    2.20  0.030 / 0.030
G14     98.7           14.4               12.0 +/-    1.92      30.3 +/-    1.92  0.030 / 0.040
G16     136.3          56.4               13.1 +/-    0.88      15.4 +/-    0.88  0.030 / 0.040
G22     194.2          55.6               11.5 +/-    0.83      13.6 +/-    0.83  0.190 / 0.270
G23     316.9          46.5               10.8 +/-    1.12      14.2 +/-    1.12  0.200 / 0.200
G26     79.4           56.1               11.1 +/-    0.78      13.0 +/-    0.78  0.130 / 0.430
G31     50.6           23.8                9.6 +/-    1.81      19.2 +/-    1.81  0.140 / 0.440