PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-09:27:50
G01     118.3          18.5                5.9 +/-    2.12      13.4 +/-    2.12  0.040 / 0.040
G07     84.4           65.5                6.8 +/-    0.45       7.4 +/-    0.45  0.030 / 0.040
G08     44.0           28.8                3.7 +/-    2.28       6.6 +/-    2.28  0.140 / 0.200
G09     173.6          20.7                5.7 +/-    1.71      12.3 +/-    1.71  0.140 / 0.180
G11     103.8          40.4                7.4 +/-    0.83      10.6 +/-    0.83  0.030 / 0.030
G13     317.1          20.5                2.4 +/-    1.74       5.2 +/-    1.74  0.030 / 0.030
G17     201.3          27.1                4.3 +/-    1.43       8.0 +/-    1.43  0.160 / 0.360
G18     91.7           21.1                7.1 +/-    1.82      15.1 +/-    1.82  0.140 / 0.410
G28     293.0          57.2                4.5 +/-    1.42       5.3 +/-    1.42  0.120 / 0.260
G30     344.8          68.4                4.9 +/-    0.63       5.2 +/-    0.63  0.130 / 0.230