PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/04-07:27:50
G10     242.9          19.4                5.5 +/-    1.84      12.3 +/-    1.84  0.100 / 0.410
G13     64.0           34.7                4.5 +/-    0.72       7.2 +/-    0.72  0.130 / 0.480
G15     104.4          56.7                6.1 +/-    0.36       7.2 +/-    0.36  0.100 / 0.260
G16     305.2          14.8                1.6 +/-    1.75       4.0 +/-    1.75  0.120 / 0.170
G20     350.8          73.9                3.7 +/-    0.42       3.8 +/-    0.42  0.050 / 0.050
G21     323.4          54.0                4.2 +/-    0.71       5.1 +/-    0.71  0.040 / 0.050
G26     276.4          18.9                4.4 +/-    1.16       9.9 +/-    1.16  0.060 / 0.050
G29     161.4          60.7                7.6 +/-    0.99       8.6 +/-    0.99  0.040 / 0.060