PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-06:57:50
G03     188.5          13.9                4.7 +/-    1.98      12.1 +/-    1.98  0.150 / 0.100
G07     300.3          43.4                5.7 +/-    2.71       7.9 +/-    2.71  0.130 / 0.130
G08     131.9          36.3                8.4 +/-    1.04      13.0 +/-    1.04  0.070 / 0.050
G09     315.7          78.6                6.6 +/-    0.61       6.7 +/-    0.61  0.080 / 0.050
G16     41.7           28.5                3.9 +/-    1.71       7.0 +/-    1.71  0.230 / 0.250
G23     137.1          71.6                7.0 +/-    0.61       7.4 +/-    0.61  0.200 / 0.340
G27     89.3           36.9                7.5 +/-    1.15      11.5 +/-    1.15  0.030 / 0.030
G30     280.2          16.8                7.1 +/-    0.73      16.8 +/-    0.73  0.030 / 0.030