PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-19:12:50
G02     61.0           31.9               14.6 +/-    1.66      24.6 +/-    1.66  0.040 / 0.100
G05     59.1           64.0               15.0 +/-    0.72      16.5 +/-    0.72  0.050 / 0.120
G12     184.9          30.2               18.3 +/-    1.68      31.9 +/-    1.68  0.040 / 0.070
G13     128.2          16.6               21.9 +/-    1.35      52.4 +/-    1.35  0.050 / 0.080
G15     162.9          13.5               23.8 +/-    1.31      61.5 +/-    1.31  0.130 / 0.280
G20     208.7          63.2               19.2 +/-    0.46      21.3 +/-    0.46  0.110 / 0.320
G21     273.3          19.7               14.4 +/-    2.45      31.8 +/-    2.45  0.030 / 0.040
G25     228.4          49.3               17.1 +/-    1.55      21.8 +/-    1.55  0.030 / 0.040
G29     333.2          60.4               15.0 +/-    0.70      17.0 +/-    0.70  0.040 / 0.050