PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/14-21:57:30
G02     51.0           40.2                9.8 +/-    1.18      14.2 +/-    1.18  0.030 / 0.020
G05     77.2           67.6               13.0 +/-    0.50      13.9 +/-    0.50  0.030 / 0.030
G12     184.2          40.7               14.5 +/-    1.19      20.8 +/-    1.19  0.050 / 0.050
G25     253.1          57.1               12.0 +/-    1.52      14.0 +/-    1.52  0.040 / 0.040
G29     321.3          44.5               12.1 +/-    0.76      16.5 +/-    0.76  0.040 / 0.070