PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-09:12:50
G08     277.4          21.7                5.0 +/-    1.87      10.6 +/-    1.87  0.030 / 0.030
G10     42.5           60.9                4.1 +/-    0.50       4.6 +/-    0.50  0.030 / 0.040
G14     247.3          60.0                6.1 +/-    0.93       6.9 +/-    0.93  0.090 / 0.230
G18     316.0          24.8                3.4 +/-    3.00       6.7 +/-    3.00  0.080 / 0.280
G20     84.7           43.2                5.9 +/-    0.40       8.2 +/-    0.40  0.110 / 0.200
G21     152.2          23.9                3.5 +/-    1.78       7.0 +/-    1.78  0.100 / 0.240
G24     44.2           16.2                2.8 +/-    1.75       6.9 +/-    1.75  0.040 / 0.070
G27     241.6          23.3                4.6 +/-    2.10       9.4 +/-    2.10  0.040 / 0.060
G31     180.9          19.4                4.0 +/-    1.77       8.8 +/-    1.77  0.110 / 0.280
G32     278.3          72.9                5.9 +/-    0.46       6.2 +/-    0.46  0.120 / 0.290