PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/08-09:27:40
G07     334.8          58.5                0.9 +/-    0.49       1.1 +/-    0.49  0.090 / 0.080
G08     98.1           50.9                2.6 +/-    0.81       3.2 +/-    0.81  0.080 / 0.110
G09     185.2          73.1                1.2 +/-    0.36       1.3 +/-    0.36  0.040 / 0.050
G11     144.8          12.2                3.2 +/-    2.66       8.5 +/-    2.66  0.040 / 0.050
G16     46.1           10.9                2.1 +/-    2.28       5.7 +/-    2.28  0.030 / 0.050
G23     155.5          45.1                2.6 +/-    0.71       3.4 +/-    0.71  0.030 / 0.040
G27     55.5           31.5                2.1 +/-    1.52       3.6 +/-    1.52  0.030 / 0.030
G28     236.5          28.9                4.4 +/-    1.80       7.8 +/-    1.80  0.030 / 0.030
G30     299.9          32.8               -0.0 +/-    2.98      -0.1 +/-    2.98  0.030 / 0.030