PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/24-04:27:50
G05     46.6           22.2                1.3 +/-    1.09       2.8 +/-    1.09  0.040 / 0.090
G13     85.1           35.4                3.9 +/-    0.61       6.1 +/-    0.61  0.040 / 0.080
G15     132.9          47.2                6.5 +/-    1.16       8.4 +/-    1.16  0.120 / 0.240
G20     241.7          31.2                8.2 +/-    2.10      13.9 +/-    2.10  0.080 / 0.210
G21     307.6          43.3                5.0 +/-    1.43       6.8 +/-    1.43  0.040 / 0.140
G25     202.7          17.1                7.5 +/-    1.09      17.8 +/-    1.09  0.050 / 0.130
G26     298.1          18.9                6.1 +/-    1.55      13.9 +/-    1.55  0.050 / 0.120
G29     139.7          76.5                6.5 +/-    0.36       6.6 +/-    0.36  0.050 / 0.160