PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-07:58:00
G07     37.2           69.2                4.2 +/-    0.51       4.5 +/-    0.51  0.060 / 0.130
G08     58.9           46.8                1.8 +/-    1.00       2.3 +/-    1.00  0.070 / 0.120
G09     177.9          43.1                5.5 +/-    1.75       7.6 +/-    1.75  0.030 / 0.040
G11     126.9          31.9                4.9 +/-    0.91       8.3 +/-    0.91  0.030 / 0.040
G18     109.2          13.1                2.6 +/-    2.88       6.9 +/-    2.88  0.080 / 0.110
G23     159.9          13.0                4.3 +/-    3.96      11.2 +/-    3.96  0.070 / 0.130
G27     38.6           13.1                1.0 +/-    1.10       2.5 +/-    1.10  0.100 / 0.300
G28     260.1          42.7                5.7 +/-    1.28       8.0 +/-    1.28  0.060 / 0.250
G30     323.6          53.8                4.3 +/-    1.14       5.2 +/-    1.14  0.050 / 0.070