PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-16:27:40
G07     36.8           68.0               12.4 +/-    0.89      13.3 +/-    0.89  0.060 / 0.100
G08     62.0           47.5               10.8 +/-    0.32      14.1 +/-    0.32  0.060 / 0.100
G09     180.7          50.0               14.6 +/-    2.07      18.5 +/-    2.07  0.020 / 0.040
G11     128.3          29.1               15.6 +/-    1.40      27.8 +/-    1.40  0.030 / 0.040
G18     112.0          10.8                3.3 +/-   31.19       9.0 +/-   31.19  0.080 / 0.150
G23     159.9          17.8               15.1 +/-    1.45      35.0 +/-    1.45  0.100 / 0.160
G27     40.6           17.6                8.3 +/-    0.97      19.4 +/-    0.97  0.110 / 0.190
G28     256.5          41.8               12.8 +/-    1.00      18.0 +/-    1.00  0.080 / 0.190
G30     323.5          53.7               13.2 +/-    0.74      15.9 +/-    0.74  0.130 / 0.390