PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/17-20:12:40
G02     41.5           48.8               12.0 +/-    0.53      15.3 +/-    0.53  0.050 / 0.060
G05     125.0          69.4               14.9 +/-    0.62      15.8 +/-    0.62  0.030 / 0.060
G12     190.1          54.1               15.8 +/-    1.12      19.0 +/-    1.12  0.040 / 0.050
G20     199.8          39.3               18.8 +/-    1.28      27.6 +/-    1.28  0.040 / 0.060
G25     267.2          60.4               13.7 +/-    0.48      15.5 +/-    0.48  0.040 / 0.090
G29     316.6          39.2               12.6 +/-    1.68      18.6 +/-    1.68  0.030 / 0.080