PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/09-16:12:50
G07     308.7          47.1                9.9 +/-    1.07      12.9 +/-    1.07  0.060 / 0.070
G08     129.4          41.7               12.9 +/-    1.16      18.3 +/-    1.16  0.060 / 0.060
G09     295.7          80.2               13.0 +/-    0.30      13.2 +/-    0.30  0.030 / 0.050
G16     42.3           21.0                9.3 +/-    1.97      19.9 +/-    1.97  0.030 / 0.050
G23     144.6          56.2               12.2 +/-    0.45      14.4 +/-    0.45  0.030 / 0.060
G27     76.1           37.1               10.6 +/-    0.78      16.2 +/-    0.78  0.030 / 0.050
G28     225.2          14.6               12.5 +/-    2.25      31.5 +/-    2.25  0.160 / 0.200
G30     287.9          24.2                9.9 +/-    2.23      19.6 +/-    2.23  0.080 / 0.170