PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/22-08:28:10
G07     24.3           68.8                3.3 +/-    0.53       3.5 +/-    0.53  0.040 / 0.050
G08     58.6           45.1                2.3 +/-    0.94       3.0 +/-    0.94  0.050 / 0.050
G09     174.8          42.2                6.1 +/-    1.42       8.6 +/-    1.42  0.030 / 0.040
G11     126.9          29.4                5.1 +/-    2.28       9.1 +/-    2.28  0.030 / 0.040
G18     111.4          11.5                3.3 +/-    1.57       9.0 +/-    1.57  0.080 / 0.160
G23     160.8          18.3                2.9 +/-    1.87       6.7 +/-    1.87  0.120 / 0.210
G27     40.1           16.4                1.7 +/-    1.17       4.0 +/-    1.17  0.080 / 0.410
G28     260.9          46.1                4.0 +/-    1.37       5.3 +/-    1.37  0.090 / 0.360
G30     320.8          51.0                3.2 +/-    1.34       4.0 +/-    1.34  0.090 / 0.240