PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/20-16:27:40
G10     260.7          34.6                8.5 +/-    2.37      13.6 +/-    2.37  0.160 / 0.430
G13     45.1           22.5                6.9 +/-    2.64      14.3 +/-    2.64  0.130 / 0.410
G15     69.4           54.8                8.0 +/-    0.56       9.5 +/-    0.56  0.040 / 0.040
G16     285.8          13.8                6.4 +/-    1.99      16.3 +/-    1.99  0.040 / 0.030
G20     286.5          57.3                7.8 +/-    1.71       9.1 +/-    1.71  0.310 / 0.340
G21     355.1          68.9                7.8 +/-    1.08       8.3 +/-    1.08  0.260 / 0.310
G24     121.6          11.1               11.4 +/-    3.38      31.1 +/-    3.38  0.040 / 0.060
G26     259.8          10.8                7.5 +/-    1.37      20.6 +/-    1.37  0.040 / 0.070
G27     321.7          12.1               -0.3 +/-   20.94      -0.9 +/-   20.94  0.370 / 0.220
G29     166.3          37.1                9.1 +/-    1.25      13.9 +/-    1.25  0.120 / 0.190