PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/29-06:12:30
G10     252.8          28.3                6.4 +/-    1.66      11.6 +/-    1.66  0.120 / 0.320
G13     51.5           28.7                6.0 +/-    1.88      10.8 +/-    1.88  0.220 / 0.420
G15     80.4           56.5                7.8 +/-    0.74       9.1 +/-    0.74  0.030 / 0.040
G16     292.7          15.3                3.7 +/-    1.68       9.2 +/-    1.68  0.030 / 0.040
G20     338.3          71.5                5.5 +/-    0.32       5.8 +/-    0.32  0.040 / 0.030
G21     336.9          62.0                5.0 +/-    1.00       5.6 +/-    1.00  0.050 / 0.040
G26     264.2          14.6                6.1 +/-    1.74      15.2 +/-    1.74  0.040 / 0.060
G29     165.7          47.3                7.6 +/-    0.55       9.9 +/-    0.55  0.060 / 0.050