PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/10-20:27:50
G02     83.2           14.4               16.3 +/-    2.28      41.3 +/-    2.28  0.120 / 0.200
G05     44.5           37.7               13.7 +/-    0.61      20.7 +/-    0.61  0.200 / 0.220
G13     101.6          33.6               17.5 +/-    1.28      28.6 +/-    1.28  0.160 / 0.290
G15     145.6          37.3               18.0 +/-    1.10      27.4 +/-    1.10  0.120 / 0.250
G18     231.0          26.9               17.0 +/-    2.73      31.8 +/-    2.73  0.070 / 0.110
G20     349.5          83.9               15.1 +/-    0.51      15.2 +/-    0.51  0.060 / 0.090
G21     296.8          36.4               15.8 +/-    1.59      24.5 +/-    1.59  0.040 / 0.060
G25     206.2          24.2               16.4 +/-    1.45      32.7 +/-    1.45  0.040 / 0.060
G26     308.6          16.5               15.0 +/-    1.62      35.9 +/-    1.62  0.040 / 0.030
G29     71.6           86.1               17.9 +/-    0.32      17.9 +/-    0.32  0.030 / 0.030