PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/09-20:43:00
G02     40.1           50.1               13.2 +/-    0.68      16.7 +/-    0.68  0.030 / 0.050
G05     126.9          68.7               16.1 +/-    0.99      17.2 +/-    0.99  0.040 / 0.050
G12     190.2          55.3               15.4 +/-    1.35      18.3 +/-    1.35  0.040 / 0.070
G20     199.4          38.2               16.8 +/-    1.92      25.2 +/-    1.92  0.060 / 0.110
G25     269.2          60.6               13.5 +/-    0.91      15.2 +/-    0.91  0.050 / 0.060
G29     315.6          37.9               13.3 +/-    1.14      20.0 +/-    1.14  0.050 / 0.090