PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/17-01:12:30
G07     4.7            66.4                4.0 +/-    0.67       4.3 +/-    0.67  0.090 / 0.110
G08     70.6           50.9                5.2 +/-    0.88       6.5 +/-    0.88  0.130 / 0.120
G09     181.9          55.6                8.1 +/-    0.47       9.5 +/-    0.47  0.030 / 0.030
G11     135.3          23.7                9.0 +/-    1.75      18.2 +/-    1.75  0.040 / 0.030
G23     159.5          23.8                7.7 +/-    1.87      15.4 +/-    1.87  0.040 / 0.040
G27     42.2           19.8                2.4 +/-    2.48       5.3 +/-    2.48  0.040 / 0.040
G28     254.2          43.1                6.4 +/-    2.20       8.9 +/-    2.20  0.080 / 0.300
G30     319.0          49.8                3.8 +/-    0.75       4.8 +/-    0.75  0.080 / 0.170