PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/19-18:58:10
G10     245.4          21.3               24.0 +/-    1.88      51.2 +/-    1.88  0.070 / 0.150
G13     61.1           34.3               19.6 +/-    1.45      31.5 +/-    1.45  0.070 / 0.180
G15     98.6           57.3               22.1 +/-    0.74      25.7 +/-    0.74  0.050 / 0.060
G16     306.7          13.0               18.7 +/-    2.18      48.7 +/-    2.18  0.060 / 0.060
G18     260.9          52.6               21.7 +/-    0.85      26.6 +/-    0.85  0.040 / 0.060
G20     37.6           54.7               19.9 +/-    0.63      23.8 +/-    0.63  0.030 / 0.050
G21     329.3          57.8               20.8 +/-    0.53      24.1 +/-    0.53  0.100 / 0.290
G29     159.9          51.2               22.7 +/-    1.86      28.3 +/-    1.86  0.100 / 0.400