PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-09:12:50
G07     42.5           68.9                6.6 +/-    0.66       7.0 +/-    0.66  0.120 / 0.210
G08     53.8           41.8                5.3 +/-    1.09       7.5 +/-    1.09  0.120 / 0.180
G09     177.3          40.1                9.7 +/-    1.19      14.0 +/-    1.19  0.030 / 0.030
G11     121.7          31.4                8.8 +/-    0.81      14.9 +/-    0.81  0.030 / 0.030
G17     198.8          12.1                2.1 +/-   10.22       5.5 +/-   10.22  0.040 / 0.040
G23     161.2          14.0                4.8 +/-    2.62      12.2 +/-    2.62  0.040 / 0.030
G27     37.8           10.3                1.5 +/-    3.75       4.1 +/-    3.75  0.050 / 0.050
G28     269.4          50.4                7.5 +/-    2.69       9.4 +/-    2.69  0.050 / 0.050
G30     326.5          55.3                5.4 +/-    0.40       6.5 +/-    0.40  0.080 / 0.310