PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/21-22:57:40
G10     305.2          54.8                8.4 +/-    1.05      10.0 +/-    1.05  0.040 / 0.040
G14     211.1          13.7               11.2 +/-    2.87      28.8 +/-    2.87  0.040 / 0.040
G15     45.7           25.0                7.2 +/-    1.94      14.1 +/-    1.94  0.150 / 0.570
G20     2.8            64.8                8.0 +/-    0.72       8.8 +/-    0.72  0.300 / 0.570
G21     106.0          72.3                8.7 +/-    0.32       9.1 +/-    0.32  0.250 / 0.110
G24     94.6           28.1                8.4 +/-    0.85      15.2 +/-    0.85  0.090 / 0.180
G27     296.8          35.7                8.9 +/-    1.49      13.9 +/-    1.49  0.130 / 0.130
G32     211.9          35.5               12.0 +/-    1.74      18.8 +/-    1.74  0.120 / 0.110