PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/27-19:12:30
G02     34.3           54.8               18.7 +/-    0.54      22.4 +/-    0.54  0.030 / 0.050
G05     145.7          62.8               22.0 +/-    0.94      24.5 +/-    0.94  0.030 / 0.040
G06     55.7           13.8               15.1 +/-    1.48      38.6 +/-    1.48  0.040 / 0.060
G12     195.7          64.0               18.3 +/-    1.08      20.2 +/-    1.08  0.030 / 0.060
G20     198.3          30.3               20.9 +/-    3.41      36.4 +/-    3.41  0.050 / 0.090
G25     286.6          58.4               18.9 +/-    0.90      21.8 +/-    0.90  0.070 / 0.100
G29     310.9          32.8               16.9 +/-    1.62      27.9 +/-    1.62  0.030 / 0.040