PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/20-19:13:10
G08     283.7          23.5                8.8 +/-    2.12      17.8 +/-    2.12  0.070 / 0.090
G10     24.6           62.7                7.7 +/-    1.23       8.6 +/-    1.23  0.080 / 0.070
G14     237.0          53.1               10.1 +/-    2.04      12.3 +/-    2.04  0.050 / 0.110
G20     75.1           48.1                8.2 +/-    0.84      10.6 +/-    0.84  0.070 / 0.110
G21     149.4          31.2                8.8 +/-    1.72      15.1 +/-    1.72  0.110 / 0.120
G24     47.4           18.8                8.9 +/-    1.95      20.1 +/-    1.95  0.110 / 0.120
G27     249.3          28.0                9.9 +/-    1.77      18.2 +/-    1.77  0.090 / 0.110
G31     183.6          11.0               -1.9 +/-   18.50      -5.3 +/-   18.50  0.090 / 0.140
G32     263.7          72.8                8.3 +/-    0.43       8.6 +/-    0.43  0.110 / 0.110