PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-22:27:30
G05     46.2           26.9                9.5 +/-    1.64      17.8 +/-    1.64  0.080 / 0.070
G13     86.6           37.1               16.2 +/-    0.74      24.8 +/-    0.74  0.090 / 0.080
G15     135.6          46.8               19.4 +/-    0.73      25.5 +/-    0.73  0.080 / 0.220
G18     239.2          35.9               18.5 +/-    1.67      28.9 +/-    1.67  0.090 / 0.190
G20     22.7           72.2               12.7 +/-    0.45      13.3 +/-    0.45  0.200 / 0.340
G21     306.6          43.0               13.6 +/-    0.98      18.8 +/-    0.98  0.160 / 0.360
G25     199.4          13.8               29.2 +/-    1.91      74.7 +/-    1.91  0.020 / 0.020
G26     296.8          19.5               12.0 +/-    1.05      26.7 +/-    1.05  0.030 / 0.030
G29     146.6          77.1               16.4 +/-    0.74      16.8 +/-    0.74  0.110 / 0.220