PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-22:27:50
G05     46.2           26.9                9.6 +/-    0.61      18.1 +/-    0.61  0.160 / 0.370
G13     86.6           37.1               16.0 +/-    0.72      24.5 +/-    0.72  0.150 / 0.350
G15     135.6          46.8               20.2 +/-    1.13      26.6 +/-    1.13  0.050 / 0.090
G18     239.2          35.9               19.5 +/-    1.32      30.4 +/-    1.32  0.050 / 0.080
G20     22.7           72.2               13.5 +/-    0.53      14.1 +/-    0.53  0.090 / 0.270
G21     306.6          43.0               14.5 +/-    1.06      20.1 +/-    1.06  0.090 / 0.180
G25     199.4          13.8               29.4 +/-    2.16      75.3 +/-    2.16  0.080 / 0.130
G26     296.8          19.5               12.8 +/-    1.61      28.5 +/-    1.61  0.050 / 0.150
G29     146.6          77.1               15.7 +/-    0.75      16.1 +/-    0.75  0.020 / 0.030