PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/27-11:58:10
G07     320.1          53.1                3.5 +/-    1.15       4.3 +/-    1.15  0.030 / 0.030
G08     115.4          46.1                7.0 +/-    0.70       9.3 +/-    0.70  0.030 / 0.020
G09     234.1          83.8                4.4 +/-    0.46       4.4 +/-    0.46  0.170 / 0.120
G16     43.1           18.7                4.0 +/-    3.31       9.1 +/-    3.31  0.090 / 0.120
G23     149.9          56.9                6.9 +/-    0.89       8.0 +/-    0.89  0.030 / 0.040
G27     68.0           35.7                4.8 +/-    1.34       7.5 +/-    1.34  0.030 / 0.040
G28     228.6          19.3                3.1 +/-    2.04       6.9 +/-    2.04  0.040 / 0.040
G30     290.6          24.8                5.9 +/-    1.71      11.5 +/-    1.71  0.030 / 0.040