PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-23:58:20
G02     230.0          71.9               10.7 +/-    0.89      11.2 +/-    0.89  0.060 / 0.090
G05     173.0          12.1               18.8 +/-    1.36      50.0 +/-    1.36  0.070 / 0.110
G06     42.8           67.2                9.8 +/-    0.35      10.6 +/-    0.35  0.040 / 0.060
G12     320.2          43.6               10.9 +/-    2.00      15.0 +/-    2.00  0.030 / 0.060
G17     66.5           24.8               10.5 +/-    0.61      20.6 +/-    0.61  0.110 / 0.240
G19     51.3           41.8                9.4 +/-    0.47      13.3 +/-    0.47  0.180 / 0.230
G24     249.8          37.5               12.6 +/-    0.97      19.1 +/-    0.97  0.040 / 0.040