PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-21:27:50
G10     246.0          21.8               16.9 +/-    1.75      35.5 +/-    1.75  0.110 / 0.230
G13     60.5           34.2               11.9 +/-    0.55      19.1 +/-    0.55  0.130 / 0.280
G15     99.0           57.7               13.2 +/-    0.67      15.3 +/-    0.67  0.110 / 0.370
G16     304.3          13.8               10.3 +/-    1.68      26.2 +/-    1.68  0.110 / 0.320
G18     261.2          52.3               13.9 +/-    0.93      17.0 +/-    0.93  0.040 / 0.060
G20     39.1           53.0               11.2 +/-    0.45      13.7 +/-    0.45  0.030 / 0.060
G21     328.2          57.3               12.2 +/-    0.87      14.2 +/-    0.87  0.030 / 0.050
G26     276.7          17.1               12.3 +/-    2.14      29.1 +/-    2.14  0.040 / 0.060
G29     161.2          52.2               12.1 +/-    0.52      14.9 +/-    0.52  0.030 / 0.050