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                8.1 +/-    0.99      14.7 +/-    0.99  0.140 / 0.630
G13     51.5           28.7                5.6 +/-    1.33      10.1 +/-    1.33  0.130 / 0.510
G15     80.4           56.5                6.6 +/-    1.00       7.7 +/-    1.00  0.040 / 0.050
G16     292.7          15.3                3.0 +/-    2.35       7.5 +/-    2.35  0.040 / 0.050
G20     338.3          71.5                5.3 +/-    0.75       5.6 +/-    0.75  0.080 / 0.120
G21     336.9          62.0                4.2 +/-    0.67       4.7 +/-    0.67  0.090 / 0.120
G26     264.2          14.6                5.1 +/-    1.94      12.9 +/-    1.94  0.040 / 0.050
G29     165.7          47.3                7.3 +/-    0.63       9.6 +/-    0.63  0.040 / 0.040