PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/09-17:27:50
G07     321.9          54.7                9.5 +/-    0.62      11.3 +/-    0.62  0.090 / 0.140
G08     118.1          45.5               12.6 +/-    0.82      16.8 +/-    0.82  0.120 / 0.140
G09     270.0          82.4               10.0 +/-    0.84      10.1 +/-    0.84  0.040 / 0.030
G16     42.9           21.8                7.1 +/-    2.32      14.9 +/-    2.32  0.040 / 0.020
G23     149.5          56.7              -10.9 +/-    0.68     -12.8 +/-    0.68  0.050 / 0.060
G27     72.5           37.4               10.2 +/-    0.67      15.5 +/-    0.67  0.050 / 0.070
G28     227.2          14.4               10.5 +/-   18.93      26.4 +/-   18.93  0.050 / 0.060
G30     291.8          27.5                8.3 +/-    1.52      15.3 +/-    1.52  0.050 / 0.050