PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-10:28:00
G01     128.8          10.1              -18.6 +/-   20.72     -51.7 +/-   20.72  0.040 / 0.040
G07     50.9           68.6                5.4 +/-    0.60       5.8 +/-    0.60  0.040 / 0.050
G08     51.6           39.8                4.3 +/-    0.92       6.3 +/-    0.92  0.020 / 0.040
G09     176.5          36.8                7.9 +/-    0.82      12.2 +/-    0.82  0.020 / 0.040
G11     118.7          32.8                7.1 +/-    0.63      11.8 +/-    0.63  0.070 / 0.100
G17     198.9          14.6                3.6 +/-    2.40       9.1 +/-    2.40  0.060 / 0.090
G23     161.2          11.7                3.0 +/-    2.39       8.2 +/-    2.39  0.040 / 0.050
G28     272.9          51.7                6.0 +/-    0.91       7.4 +/-    0.91  0.040 / 0.050
G30     328.5          56.9                4.5 +/-    0.62       5.3 +/-    0.62  0.170 / 0.360