PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-06:13:00
G03     234.5          65.7                6.1 +/-    0.44       6.6 +/-    0.44  0.040 / 0.050
G07     251.1          11.6                1.0 +/-   15.75       2.6 +/-   15.75  0.040 / 0.050
G09     306.8          23.9                4.1 +/-    1.12       8.2 +/-    1.12  0.050 / 0.040
G14     103.8          10.2                5.6 +/-    2.17      15.5 +/-    2.17  0.050 / 0.040
G16     124.5          61.9                7.2 +/-    0.74       8.0 +/-    0.74  0.120 / 0.250
G22     192.7          51.6                6.5 +/-    0.42       8.0 +/-    0.42  0.120 / 0.190
G23     321.2          50.9                5.3 +/-    0.97       6.6 +/-    0.97  0.390 / 0.150
G26     66.3           52.0                5.1 +/-    0.73       6.3 +/-    0.73  0.200 / 0.280
G31     53.7           18.3                2.7 +/-    3.80       6.2 +/-    3.80  0.050 / 0.040