PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-14:12:40
G03     233.3          70.3                9.3 +/-    0.48       9.9 +/-    0.48  0.120 / 0.310
G09     300.7          14.4                6.7 +/-    3.26      17.0 +/-    3.26  0.170 / 0.260
G14     96.7           16.1                7.8 +/-    0.96      18.9 +/-    0.96  0.090 / 0.300
G16     139.5          54.2               10.7 +/-    0.47      12.9 +/-    0.47  0.100 / 0.250
G22     190.5          55.4               10.0 +/-    0.81      11.8 +/-    0.81  0.030 / 0.030
G23     316.3          46.1                7.5 +/-    0.78      10.0 +/-    0.78  0.030 / 0.050
G26     79.4           54.9                7.9 +/-    0.51       9.4 +/-    0.51  0.050 / 0.040
G31     50.3           23.2                5.6 +/-    2.76      11.4 +/-    2.76  0.050 / 0.050