PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-16:58:10
G07     342.1          61.1               13.3 +/-    0.89      15.0 +/-    0.89  0.040 / 0.040
G08     92.0           53.7               15.0 +/-    0.35      18.1 +/-    0.35  0.050 / 0.060
G09     185.5          66.9               15.7 +/-    0.85      16.9 +/-    0.85  0.080 / 0.130
G11     142.5          17.0               16.3 +/-    2.04      38.7 +/-    2.04  0.080 / 0.130
G23     155.8          30.4               16.0 +/-    0.89      27.7 +/-    0.89  0.080 / 0.130
G27     49.3           27.8                9.6 +/-    0.75      17.7 +/-    0.75  0.050 / 0.100
G28     242.9          34.8               17.7 +/-    1.14      28.3 +/-    1.14  0.090 / 0.210
G30     307.8          40.2               12.3 +/-    0.68      17.8 +/-    0.68  0.070 / 0.200