PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/17-07:57:40
G03     236.2          66.1               -2.7 +/-   14.50      -2.9 +/-   14.50  0.080 / 0.130
G07     250.8          11.8                0.2 +/-   15.44       0.6 +/-   15.44  0.110 / 0.140
G09     306.6          23.9                4.5 +/-    1.55       9.0 +/-    1.55  0.040 / 0.040
G14     103.4          10.4                3.0 +/-    4.31       8.3 +/-    4.31  0.040 / 0.050
G16     123.2          61.7               14.6 +/-   13.74      16.3 +/-   13.74  0.040 / 0.050
G22     192.0          51.8                6.2 +/-    0.81       7.7 +/-    0.81  0.040 / 0.050
G23     320.9          50.5                3.6 +/-    0.62       4.5 +/-    0.62  0.070 / 0.240
G26     66.0           51.5              -30.4 +/-   66.75     -37.7 +/-   66.75  0.120 / 0.240
G31     53.7           17.7                6.9 +/-   18.46      16.0 +/-   18.46  0.160 / 0.410