PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-02:27:50
G02     42.3           46.9                6.1 +/-    0.83       8.0 +/-    0.83  0.040 / 0.050
G05     112.2          68.3                7.2 +/-    1.02       7.7 +/-    1.02  0.030 / 0.050
G06     58.2           11.3                6.5 +/-    2.49      17.6 +/-    2.49  0.050 / 0.050
G12     194.3          59.2                9.7 +/-    1.51      11.1 +/-    1.51  0.050 / 0.060
G25     278.0          58.5                9.0 +/-    0.73      10.3 +/-    0.73  0.020 / 0.040
G29     316.6          39.4                8.4 +/-    0.89      12.4 +/-    0.89  0.030 / 0.040