PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-09:12:40
G08     309.9          17.7                5.3 +/-    3.06      12.3 +/-    3.06  0.080 / 0.120
G10     338.3          60.9                4.6 +/-    0.55       5.1 +/-    0.55  0.090 / 0.120
G14     220.4          30.5                7.2 +/-    2.32      12.4 +/-    2.32  0.140 / 0.280
G20     77.4           28.9                5.0 +/-    1.73       9.0 +/-    1.73  0.080 / 0.170
G21     137.5          53.5                6.6 +/-    0.32       8.0 +/-    0.32  0.040 / 0.040
G24     70.0           29.7                5.3 +/-    1.85       9.3 +/-    1.85  0.040 / 0.040
G27     269.6          36.8                6.2 +/-    2.03       9.5 +/-    2.03  0.050 / 0.080
G32     226.9          57.4                6.7 +/-    2.37       7.8 +/-    2.37  0.100 / 0.080