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                8.7 +/-    1.11      13.9 +/-    1.11  0.120 / 0.210
G13     45.1           22.5                6.5 +/-    0.76      13.5 +/-    0.76  0.150 / 0.210
G15     69.4           54.8                8.0 +/-    0.47       9.6 +/-    0.47  0.040 / 0.090
G16     285.8          13.8                6.6 +/-    1.52      16.8 +/-    1.52  0.040 / 0.100
G20     286.5          57.3                9.4 +/-    0.84      11.0 +/-    0.84  0.120 / 0.340
G21     355.1          68.9                8.9 +/-    1.12       9.5 +/-    1.12  0.120 / 0.340
G24     121.6          11.1                9.3 +/-   25.71      25.5 +/-   25.71  0.120 / 0.310
G26     259.8          10.8                7.4 +/-    2.30      20.4 +/-    2.30  0.090 / 0.350
G27     321.7          12.1                6.1 +/-    8.00      16.2 +/-    8.00  0.040 / 0.050
G29     166.3          37.1               10.8 +/-    0.99      16.5 +/-    0.99  0.050 / 0.050