PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/22-09:43:10
G01     128.5          10.3              -10.3 +/-   31.89     -28.5 +/-   31.89  0.180 / 0.260
G07     51.5           68.7                4.5 +/-    0.86       4.8 +/-    0.86  0.290 / 0.330
G08     51.3           39.6                2.7 +/-    1.40       4.0 +/-    1.40  0.020 / 0.030
G09     176.8          36.8                5.9 +/-    0.91       9.1 +/-    0.91  0.030 / 0.020
G11     118.6          33.1                5.5 +/-    1.77       9.1 +/-    1.77  0.070 / 0.070
G17     199.0          15.0                4.4 +/-    3.33      10.9 +/-    3.33  0.080 / 0.080
G23     161.2          11.3                4.0 +/-    1.69      10.9 +/-    1.69  0.040 / 0.040
G28     273.6          52.0                4.9 +/-    2.62       6.1 +/-    2.62  0.030 / 0.030
G30     329.3          57.5                2.7 +/-    0.42       3.1 +/-    0.42  0.050 / 0.060