PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/15-14:13:10
G02     47.7           42.6                6.6 +/-    0.67       9.2 +/-    0.67  0.040 / 0.030
G05     101.7          70.1                9.0 +/-    0.74       9.5 +/-    0.74  0.030 / 0.030
G12     190.7          51.2               12.0 +/-    1.83      14.9 +/-    1.83  0.050 / 0.090
G20     202.2          41.2               13.0 +/-    0.89      18.6 +/-    0.89  0.060 / 0.100
G21     260.0          10.7               -3.1 +/-   16.58      -8.6 +/-   16.58  0.130 / 0.370
G25     265.1          58.7                9.1 +/-    1.22      10.4 +/-    1.22  0.130 / 0.490
G29     321.5          45.4                4.9 +/-    1.38       6.5 +/-    1.38  0.080 / 0.040