PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-07:12:30
G03     198.8          35.7                7.6 +/-    1.56      11.9 +/-    1.56  0.080 / 0.120
G08     148.5          17.8                6.7 +/-    1.70      15.6 +/-    1.70  0.110 / 0.120
G09     320.7          51.9                4.7 +/-    1.42       5.9 +/-    1.42  0.050 / 0.050
G16     51.5           54.8                5.7 +/-    0.53       6.8 +/-    0.53  0.040 / 0.060
G22     181.5          19.0                5.6 +/-    1.36      12.7 +/-    1.36  0.080 / 0.100
G23     5.4            79.6                4.0 +/-    0.49       4.0 +/-    0.49  0.080 / 0.110
G26     43.6           26.4                3.6 +/-    1.11       6.7 +/-    1.11  0.030 / 0.040
G27     112.8          26.8                6.5 +/-    0.98      12.3 +/-    0.98  0.020 / 0.030