PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/09-12:57:50
G01     61.5           30.8                4.7 +/-    0.83       8.2 +/-    0.83  0.040 / 0.050
G06     181.0          13.2                5.2 +/-    0.96      13.6 +/-    0.96  0.040 / 0.050
G07     141.4          21.3                4.9 +/-    0.70      10.5 +/-    0.70  0.040 / 0.120
G11     48.3           22.7                3.9 +/-    0.82       7.9 +/-    0.82  0.040 / 0.120
G13     267.1          35.3                4.7 +/-    1.21       7.4 +/-    1.21  0.120 / 0.360
G15     296.9          15.9                2.7 +/-    2.04       6.5 +/-    2.04  0.110 / 0.330
G17     260.4          77.9                4.0 +/-    0.40       4.1 +/-    0.40  0.040 / 0.090
G19     231.7          51.5                5.6 +/-    1.00       7.0 +/-    1.00  0.060 / 0.090
G28     34.0           56.9                4.6 +/-    0.40       5.4 +/-    0.40  0.020 / 0.030
G30     142.2          55.4                4.2 +/-    1.15       5.0 +/-    1.15  0.040 / 0.020