PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/19-08:42:50
G08     320.0          11.1               -5.1 +/-   27.45     -13.9 +/-   27.45  0.040 / 0.070
G10     313.4          56.3                4.0 +/-    1.69       4.7 +/-    1.69  0.050 / 0.070
G14     214.1          18.0                4.8 +/-    1.80      11.0 +/-    1.80  0.100 / 0.330
G15     45.6           18.4                2.9 +/-    2.77       6.7 +/-    2.77  0.210 / 0.450
G20     65.3           37.6                4.7 +/-    1.22       7.1 +/-    1.22  0.030 / 0.040
G21     121.3          66.1                6.8 +/-    0.57       7.4 +/-    0.57  0.040 / 0.040
G24     85.9           29.5                7.0 +/-    1.05      12.5 +/-    1.05  0.050 / 0.080
G27     287.3          37.5                6.4 +/-    1.42       9.7 +/-    1.42  0.050 / 0.070
G32     215.8          44.0                6.4 +/-    1.08       8.8 +/-    1.08  0.180 / 0.280