PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/20-01:27:40
G08     319.4          11.9                7.0 +/-    7.82      18.8 +/-    7.82  0.040 / 0.040
G10     316.3          57.4                9.0 +/-    1.12      10.5 +/-    1.12  0.040 / 0.040
G14     213.2          20.7               13.1 +/-    2.10      28.3 +/-    2.10  0.240 / 0.260
G15     45.7           18.3                7.0 +/-    2.84      16.0 +/-    2.84  0.100 / 0.220
G20     16.3           63.7                9.6 +/-    0.92      10.6 +/-    0.92  0.050 / 0.060
G21     120.9          66.9               11.9 +/-    0.58      12.8 +/-    0.58  0.060 / 0.070
G24     86.3           29.6               12.1 +/-    1.31      21.3 +/-    1.31  0.120 / 0.240
G27     288.8          37.3               11.1 +/-    0.93      16.8 +/-    0.93  0.120 / 0.410
G32     215.6          41.2               12.0 +/-    1.55      17.1 +/-    1.55  0.060 / 0.030