PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/11-10:57:40
G01     91.7           31.5                4.1 +/-    0.96       6.9 +/-    0.96  0.020 / 0.020
G07     124.5          46.0                6.4 +/-    0.94       8.5 +/-    0.94  0.030 / 0.020
G11     68.8           39.6                4.2 +/-    1.32       6.1 +/-    1.32  0.080 / 0.090
G13     295.7          35.9                6.3 +/-    2.91       9.9 +/-    2.91  0.090 / 0.100
G17     213.1          53.9               10.2 +/-    0.66      12.3 +/-    0.66  0.070 / 0.110
G18     63.8           23.5                3.2 +/-    1.31       6.5 +/-    1.31  0.080 / 0.120
G19     214.4          21.6                5.4 +/-    2.29      11.4 +/-    2.29  0.040 / 0.040
G28     344.8          61.8                5.0 +/-    0.72       5.6 +/-    0.72  0.050 / 0.050
G30     95.5           78.4                5.5 +/-    0.33       5.6 +/-    0.33  0.070 / 0.150