PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/20-02:27:50
G08     296.2          21.8                9.4 +/-    1.19      19.7 +/-    1.19  0.040 / 0.070
G10     11.5           62.7                9.9 +/-    1.18      11.0 +/-    1.18  0.050 / 0.090
G14     229.4          46.0               13.0 +/-    2.23      17.2 +/-    2.23  0.100 / 0.120
G18     317.9          10.7               -9.5 +/-   17.27     -26.0 +/-   17.27  0.130 / 0.140
G20     65.4           52.4                9.9 +/-    1.11      12.1 +/-    1.11  0.090 / 0.130
G21     147.0          40.9               12.7 +/-    1.08      18.1 +/-    1.08  0.080 / 0.110
G24     56.3           25.7                9.8 +/-    1.96      18.9 +/-    1.96  0.280 / 0.400
G27     254.8          31.9                9.9 +/-    2.17      16.7 +/-    2.17  0.040 / 0.030
G32     244.7          66.8               10.6 +/-    0.49      11.4 +/-    0.49  0.050 / 0.030