PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/09-16:12:40
G07     308.7          47.1               10.4 +/-    1.25      13.6 +/-    1.25  0.050 / 0.080
G08     129.4          41.7               12.7 +/-    1.09      18.0 +/-    1.09  0.050 / 0.080
G09     295.7          80.2                9.0 +/-    1.21       9.2 +/-    1.21  0.030 / 0.060
G16     42.3           21.0                8.3 +/-    0.81      17.8 +/-    0.81  0.030 / 0.050
G23     144.6          56.2               12.1 +/-    0.83      14.3 +/-    0.83  0.110 / 0.220
G27     76.1           37.1               10.0 +/-    0.96      15.3 +/-    0.96  0.090 / 0.200
G28     225.2          14.6               12.7 +/-    2.69      31.9 +/-    2.69  0.180 / 0.430
G30     287.9          24.2               10.2 +/-    1.56      20.2 +/-    1.56  0.180 / 0.450