PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/12-19:42:40
G10     251.0          26.2               13.8 +/-    1.28      26.1 +/-    1.28  0.070 / 0.150
G13     54.2           31.0               14.3 +/-    0.40      24.6 +/-    0.40  0.110 / 0.120
G15     84.7           57.0               13.3 +/-    0.65      15.5 +/-    0.65  0.050 / 0.070
G16     299.7          13.6               12.4 +/-    1.18      31.8 +/-    1.18  0.050 / 0.060
G18     270.6          56.9               13.8 +/-    0.94      16.1 +/-    0.94  0.140 / 0.300
G20     42.8           48.5               13.1 +/-    0.51      16.9 +/-    0.51  0.110 / 0.310
G21     337.6          62.3               14.3 +/-    0.67      15.9 +/-    0.67  0.040 / 0.050
G26     272.2          14.9               15.7 +/-    1.68      39.0 +/-    1.68  0.040 / 0.040
G29     162.5          43.9               15.2 +/-    0.94      20.8 +/-    0.94  0.100 / 0.270