PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/11/20-14:57:50
G10     248.0          26.5                7.3 +/-    1.23      13.9 +/-    1.23  0.280 / 0.440
G13     55.8           30.2                7.8 +/-    1.10      13.6 +/-    1.10  0.230 / 0.510
G15     87.8           56.6                8.2 +/-    0.75       9.6 +/-    0.75  0.030 / 0.030
G16     298.0          16.0                5.0 +/-    8.19      12.1 +/-    8.19  0.040 / 0.040
G20     268.3          51.3                9.4 +/-    3.71      11.7 +/-    3.71  0.040 / 0.050
G21     331.3          58.0                6.4 +/-    0.91       7.4 +/-    0.91  0.040 / 0.040
G26     271.4          16.5                5.3 +/-    1.83      12.7 +/-    1.83  0.090 / 0.150
G29     162.8          54.9               10.1 +/-    0.61      12.1 +/-    0.61  0.110 / 0.150