PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/25-19:42:40
G10     246.9          23.8                9.8 +/-    1.45      19.8 +/-    1.45  0.210 / 0.680
G13     57.7           31.9                9.6 +/-    1.10      16.1 +/-    1.10  0.180 / 0.650
G15     105.3          59.4                9.5 +/-    0.42      10.8 +/-    0.42  0.040 / 0.060
G16     299.6          15.6                6.1 +/-    3.00      15.0 +/-    3.00  0.040 / 0.060
G20     264.0          47.8               10.1 +/-    0.66      13.1 +/-    0.66  0.050 / 0.110
G21     328.9          57.2                8.9 +/-    0.97      10.4 +/-    0.97  0.050 / 0.130
G26     272.1          17.2                8.3 +/-    1.74      19.6 +/-    1.74  0.040 / 0.050
G29     163.3          55.6               11.3 +/-    0.98      13.4 +/-    0.98  0.040 / 0.050