PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-09:12:50
G08     292.8          23.3                5.0 +/-    1.69      10.1 +/-    1.69  0.060 / 0.090
G10     10.2           62.8                3.3 +/-    0.89       3.6 +/-    0.89  0.050 / 0.090
G14     229.6          47.4                8.2 +/-    2.10      10.7 +/-    2.10  0.110 / 0.100
G18     317.7          11.9               -0.9 +/-   14.90      -2.5 +/-   14.90  0.110 / 0.100
G20     65.9           52.0                5.4 +/-    1.12       6.6 +/-    1.12  0.030 / 0.030
G21     146.4          38.2                9.0 +/-    0.52      13.4 +/-    0.52  0.030 / 0.030
G24     55.0           24.5                3.3 +/-    2.00       6.5 +/-    2.00  0.030 / 0.040
G27     256.2          31.9                5.8 +/-    1.86       9.7 +/-    1.86  0.030 / 0.030
G32     241.8          62.2                6.8 +/-    0.70       7.6 +/-    0.70  0.080 / 0.100