PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/09-23:42:40
G07     13.1           67.8                6.5 +/-    0.44       6.9 +/-    0.44  0.090 / 0.160
G08     66.3           50.0                7.1 +/-    0.68       8.9 +/-    0.68  0.100 / 0.160
G09     181.2          51.6                9.4 +/-    1.66      11.6 +/-    1.66  0.040 / 0.090
G11     133.3          26.0                9.3 +/-    0.64      17.7 +/-    0.64  0.050 / 0.090
G23     159.6          19.4                9.5 +/-    1.67      21.2 +/-    1.67  0.030 / 0.050
G27     40.5           17.0                5.1 +/-    1.07      12.1 +/-    1.07  0.040 / 0.050
G28     258.6          45.5                8.2 +/-    1.27      11.0 +/-    1.27  0.030 / 0.040
G30     323.8          53.5                7.5 +/-    0.96       9.1 +/-    0.96  0.040 / 0.040