PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-10:28:10
G05     51.6           10.4                3.8 +/-    1.51      10.4 +/-    1.51  0.050 / 0.040
G10     240.6          16.8                4.0 +/-    1.55       9.4 +/-    1.55  0.060 / 0.050
G13     68.2           35.9                5.0 +/-    0.98       7.8 +/-    0.98  0.060 / 0.090
G15     109.8          55.6                8.3 +/-    0.99       9.8 +/-    0.99  0.050 / 0.070
G16     309.5          13.5                3.7 +/-    0.86       9.4 +/-    0.86  0.120 / 0.370
G20     25.6           65.5                5.2 +/-    1.08       5.6 +/-    1.08  0.160 / 0.370
G21     321.6          53.1                5.0 +/-    2.34       6.0 +/-    2.34  0.120 / 0.290
G26     280.7          19.5                3.5 +/-    1.68       7.8 +/-    1.68  0.130 / 0.300
G29     159.0          63.0                8.8 +/-    1.69       9.8 +/-    1.69  0.070 / 0.110