PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-00:42:20
G02     45.2           44.9               10.2 +/-    0.69      13.7 +/-    0.69  0.040 / 0.040
G05     100.5          69.0               12.4 +/-    0.85      13.2 +/-    0.85  0.040 / 0.050
G12     188.3          51.7               14.2 +/-    0.61      17.5 +/-    0.61  0.030 / 0.030
G25     272.5          58.1               15.3 +/-    0.97      17.7 +/-    0.97  0.030 / 0.030
G29     316.0          37.6               11.9 +/-    1.17      18.0 +/-    1.17  0.040 / 0.050