PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/07-08:28:00
G07     31.1           68.7                4.7 +/-    0.78       5.0 +/-    0.78  0.020 / 0.040
G08     57.5           44.4                3.9 +/-    0.65       5.3 +/-    0.65  0.030 / 0.040
G09     178.0          44.5                7.1 +/-    1.51       9.7 +/-    1.51  0.050 / 0.080
G11     125.4          29.2                6.6 +/-    0.90      11.8 +/-    0.90  0.050 / 0.080
G23     161.0          17.5                4.7 +/-    1.78      11.0 +/-    1.78  0.050 / 0.050
G27     38.8           13.3                2.1 +/-    0.91       5.5 +/-    0.91  0.070 / 0.080
G28     264.3          48.3                6.8 +/-    0.51       8.8 +/-    0.51  0.040 / 0.080
G30     323.1          52.6                5.0 +/-    1.05       6.1 +/-    1.05  0.120 / 0.240