PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/12-01:42:40
G07     15.6           68.0                4.0 +/-    0.32       4.3 +/-    0.32  0.090 / 0.090
G08     64.2           48.7                3.9 +/-    0.66       5.0 +/-    0.66  0.080 / 0.090
G09     180.8          50.7                6.7 +/-    0.94       8.4 +/-    0.94  0.030 / 0.030
G11     131.7          26.6                4.8 +/-    0.73       9.1 +/-    0.73  0.030 / 0.030
G23     160.1          19.7                5.5 +/-    3.00      12.2 +/-    3.00  0.050 / 0.040
G27     40.2           16.4                1.9 +/-    1.70       4.7 +/-    1.70  0.060 / 0.040
G28     259.4          46.0                4.3 +/-    3.42       5.8 +/-    3.42  0.030 / 0.040
G30     323.0          52.8                3.5 +/-    0.59       4.3 +/-    0.59  0.030 / 0.050