PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-13:27:30
G03     214.5          59.9               12.6 +/-    0.96      14.3 +/-    0.96  0.100 / 0.140
G07     254.9          13.2               11.2 +/-    2.38      29.1 +/-    2.38  0.100 / 0.150
G09     309.1          26.0                7.7 +/-    0.57      14.7 +/-    0.57  0.050 / 0.080
G14     106.4          11.8               -3.7 +/-   17.96      -9.9 +/-   17.96  0.040 / 0.070
G16     98.5           63.7               11.0 +/-    1.09      12.1 +/-    1.09  0.040 / 0.040
G22     185.7          41.5               11.8 +/-    1.11      16.8 +/-    1.11  0.030 / 0.040
G23     333.0          61.4                9.0 +/-    0.81      10.1 +/-    0.81  0.040 / 0.030
G26     54.7           43.5                9.2 +/-    0.85      12.7 +/-    0.85  0.050 / 0.040
G31     58.5           10.2                8.0 +/-    4.88      22.2 +/-    4.88  0.160 / 0.200