PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/17-20:27:40
G02     47.3           43.9               12.6 +/-    0.75      17.3 +/-    0.75  0.050 / 0.070
G05     102.6          71.5               14.7 +/-    0.72      15.4 +/-    0.72  0.040 / 0.080
G12     187.8          46.6               15.6 +/-    1.87      20.5 +/-    1.87  0.040 / 0.060
G20     201.5          46.5               18.2 +/-    1.99      24.1 +/-    1.99  0.040 / 0.060
G25     252.3          59.0               14.5 +/-    0.58      16.6 +/-    0.58  0.050 / 0.050
G29     321.1          44.8               10.8 +/-    0.94      14.6 +/-    0.94  0.040 / 0.060