PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-23:28:30
G02     213.8          58.3               13.5 +/-    0.84      15.6 +/-    0.84  0.120 / 0.180
G06     75.0           79.4               10.4 +/-    0.45      10.5 +/-    0.45  0.110 / 0.220
G12     316.5          30.9               10.1 +/-    0.97      17.3 +/-    0.97  0.060 / 0.070
G17     55.3           33.3               10.1 +/-    0.57      16.6 +/-    0.57  0.070 / 0.090
G19     36.1           50.7               10.3 +/-    0.42      12.8 +/-    0.42  0.050 / 0.110
G24     267.4          42.2               11.2 +/-    1.04      15.8 +/-    1.04  0.060 / 0.110
G28     119.4          19.5               14.9 +/-    0.83      33.1 +/-    0.83  0.030 / 0.030