PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/08-09:27:50
G07     334.8          58.5                0.5 +/-    0.93       0.6 +/-    0.93  0.040 / 0.050
G08     98.1           50.9                1.9 +/-    0.58       2.4 +/-    0.58  0.040 / 0.050
G09     185.2          73.1                1.1 +/-    0.63       1.1 +/-    0.63  0.080 / 0.110
G11     144.8          12.2                3.6 +/-    1.54       9.5 +/-    1.54  0.080 / 0.100
G16     46.1           10.9                2.2 +/-    1.43       6.0 +/-    1.43  0.030 / 0.040
G23     155.5          45.1                1.7 +/-    0.59       2.3 +/-    0.59  0.030 / 0.030
G27     55.5           31.5                1.8 +/-    0.66       3.1 +/-    0.66  0.040 / 0.050
G28     236.5          28.9                2.5 +/-    1.88       4.5 +/-    1.88  0.040 / 0.050
G30     299.9          32.8                0.7 +/-    1.04       1.2 +/-    1.04  0.050 / 0.070