PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/20-17:43:10
G01     312.3          30.5                7.7 +/-    1.48      13.4 +/-    1.48  0.100 / 0.160
G10     97.3           43.5                8.5 +/-    0.62      11.7 +/-    0.62  0.120 / 0.160
G11     295.2          24.1                7.1 +/-    1.32      14.2 +/-    1.32  0.040 / 0.050
G14     322.8          70.1                6.8 +/-    0.71       7.2 +/-    0.71  0.040 / 0.040
G20     116.1          16.8                8.2 +/-    1.35      19.6 +/-    1.35  0.130 / 0.190
G22     306.8          18.6                7.9 +/-    1.82      18.1 +/-    1.82  0.160 / 0.280
G25     90.1           13.2               10.6 +/-    2.52      27.5 +/-    2.52  0.070 / 0.040
G31     172.8          54.7                9.4 +/-    0.38      11.2 +/-    0.38  0.060 / 0.050
G32     28.9           57.2                7.2 +/-    1.09       8.4 +/-    1.09  0.030 / 0.050