PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/08-06:57:40
G07     316.4          51.2                3.9 +/-    0.82       4.9 +/-    0.82  0.120 / 0.560
G08     117.6          45.5                8.5 +/-    0.98      11.3 +/-    0.98  0.120 / 0.440
G09     252.0          83.8                5.7 +/-    0.52       5.7 +/-    0.52  0.030 / 0.030
G16     42.6           22.6                2.7 +/-    1.16       5.5 +/-    1.16  0.030 / 0.030
G23     149.5          58.6                7.6 +/-    0.55       8.7 +/-    0.55  0.030 / 0.040
G27     69.4           36.0                4.2 +/-    0.56       6.5 +/-    0.56  0.030 / 0.050
G28     227.9          18.8                4.4 +/-    5.76      10.1 +/-    5.76  0.050 / 0.080
G30     290.5          25.4                6.7 +/-    1.04      12.9 +/-    1.04  0.040 / 0.080