PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/04-10:57:40
G01     128.3          10.5               -5.6 +/-   30.88     -15.5 +/-   30.88  0.230 / 0.340
G07     53.2           68.4                5.8 +/-    1.04       6.2 +/-    1.04  0.230 / 0.380
G08     51.1           39.3                4.2 +/-    1.19       6.1 +/-    1.19  0.030 / 0.020
G09     176.2          35.9                6.1 +/-    1.31       9.5 +/-    1.31  0.030 / 0.020
G11     117.9          33.1                5.1 +/-    0.88       8.3 +/-    0.88  0.040 / 0.030
G17     199.0          15.3                5.8 +/-    2.63      14.2 +/-    2.63  0.030 / 0.030
G23     161.2          11.1                3.9 +/-    2.37      10.8 +/-    2.37  0.320 / 0.290
G28     273.8          52.0                4.5 +/-    2.73       5.6 +/-    2.73  0.110 / 0.200
G30     329.0          57.3                3.9 +/-    0.32       4.5 +/-    0.32  0.040 / 0.050