PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/23-05:57:50
G07     316.8          51.4                5.1 +/-    1.19       6.3 +/-    1.19  0.080 / 0.210
G08     117.1          45.8                8.6 +/-    0.96      11.4 +/-    0.96  0.070 / 0.230
G09     251.2          83.6                6.2 +/-    0.77       6.2 +/-    0.77  0.040 / 0.060
G16     42.6           22.8                2.2 +/-    0.96       4.5 +/-    0.96  0.030 / 0.050
G23     149.8          57.8                8.1 +/-    0.56       9.4 +/-    0.56  0.120 / 0.410
G27     68.7           35.9                4.4 +/-    0.49       6.9 +/-    0.49  0.130 / 0.390
G28     228.3          19.3                4.2 +/-    6.98       9.4 +/-    6.98  0.030 / 0.050
G30     291.1          26.2                5.9 +/-    0.90      11.1 +/-    0.90  0.040 / 0.040