PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-08:28:00
G08     285.3          23.0                6.6 +/-    1.32      13.5 +/-    1.32  0.050 / 0.110
G10     26.8           62.3                4.5 +/-    0.37       5.0 +/-    0.37  0.050 / 0.120
G14     237.2          53.9                6.7 +/-    1.45       8.1 +/-    1.45  0.150 / 0.140
G18     317.4          18.1                4.4 +/-    0.92      10.1 +/-    0.92  0.110 / 0.130
G20     75.8           47.7                5.0 +/-    0.47       6.4 +/-    0.47  0.040 / 0.030
G21     149.8          31.4                8.0 +/-    0.87      13.5 +/-    0.87  0.030 / 0.030
G24     49.1           20.9                1.9 +/-    1.21       4.2 +/-    1.21  0.070 / 0.160
G27     248.3          27.9                8.2 +/-    2.60      15.1 +/-    2.60  0.070 / 0.180
G31     182.4          12.6                5.8 +/-    1.66      15.3 +/-    1.66  0.050 / 0.080
G32     257.2          69.0                7.2 +/-    0.30       7.7 +/-    0.30  0.040 / 0.090