PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/17-19:27:30
G10     253.1          27.9               15.4 +/-    1.74      28.2 +/-    1.74  0.040 / 0.050
G13     52.0           29.6               12.4 +/-    0.96      21.9 +/-    0.96  0.040 / 0.050
G15     79.8           56.3               12.9 +/-    0.70      15.1 +/-    0.70  0.130 / 0.250
G16     297.6          13.5               10.2 +/-    1.88      26.3 +/-    1.88  0.090 / 0.290
G18     274.7          58.4               14.6 +/-    0.68      16.8 +/-    0.68  0.040 / 0.080
G20     44.4           46.6               12.6 +/-    0.81      16.6 +/-    0.81  0.040 / 0.080
G21     341.6          64.1               13.4 +/-    0.81      14.7 +/-    0.81  0.100 / 0.340
G26     270.2          14.0               13.3 +/-    1.39      34.0 +/-    1.39  0.100 / 0.400
G29     163.0          41.0               15.2 +/-    0.71      21.7 +/-    0.71  0.060 / 0.150