PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-04:42:40
G10     241.5          19.6                6.2 +/-    2.68      13.8 +/-    2.68  0.040 / 0.050
G13     65.0           34.0                5.4 +/-    1.17       8.7 +/-    1.17  0.050 / 0.050
G15     107.4          56.3                6.5 +/-    0.58       7.6 +/-    0.58  0.130 / 0.210
G16     310.0          12.9                3.9 +/-    4.88      10.1 +/-    4.88  0.140 / 0.250
G20     256.4          43.2                8.0 +/-    1.90      11.1 +/-    1.90  0.070 / 0.110
G21     323.1          53.4                6.8 +/-    0.77       8.3 +/-    0.77  0.060 / 0.120
G26     281.8          18.4                4.3 +/-    1.46       9.8 +/-    1.46  0.050 / 0.060
G29     156.7          58.9                6.8 +/-    0.41       7.8 +/-    0.41  0.040 / 0.060