PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/12-08:28:00
G10     251.7          28.6                6.1 +/-    1.74      11.0 +/-    1.74  0.060 / 0.050
G13     52.1           28.5                3.3 +/-    2.22       6.0 +/-    2.22  0.060 / 0.040
G15     82.1           56.6                6.0 +/-    0.38       7.0 +/-    0.38  0.090 / 0.300
G16     299.9          13.6                1.7 +/-    2.47       4.4 +/-    2.47  0.110 / 0.320
G20     272.1          52.0                5.9 +/-    2.83       7.3 +/-    2.83  0.120 / 0.210
G21     342.0          63.5                5.1 +/-    1.10       5.6 +/-    1.10  0.130 / 0.180
G26     271.4          14.6                4.1 +/-    1.72      10.2 +/-    1.72  0.120 / 0.130
G29     161.5          43.2                7.2 +/-    1.96      10.0 +/-    1.96  0.060 / 0.090