PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/09-16:43:10
G07     36.8           67.9                9.4 +/-    0.68      10.1 +/-    0.68  0.050 / 0.110
G08     62.1           47.4                8.5 +/-    0.31      11.1 +/-    0.31  0.060 / 0.110
G09     180.7          50.2               11.5 +/-    1.85      14.4 +/-    1.85  0.080 / 0.190
G11     128.4          29.0               13.4 +/-    0.98      24.0 +/-    0.98  0.120 / 0.210
G18     112.0          10.7                0.0 +/-   31.42       0.0 +/-   31.42  0.190 / 0.360
G23     159.9          18.1               11.1 +/-    0.95      25.5 +/-    0.95  0.140 / 0.340
G27     40.7           17.8                7.4 +/-    0.61      17.2 +/-    0.61  0.080 / 0.120
G28     256.4          41.8               10.2 +/-    1.35      14.4 +/-    1.35  0.070 / 0.140
G30     323.1          53.4               10.9 +/-    0.69      13.3 +/-    0.69  0.100 / 0.290