PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/16-09:27:50
G08     277.9          21.9                6.4 +/-    1.50      13.5 +/-    1.50  0.130 / 0.190
G10     41.2           61.1                5.2 +/-    1.26       5.9 +/-    1.26  0.120 / 0.200
G14     246.4          59.5                6.8 +/-    0.53       7.8 +/-    0.53  0.030 / 0.030
G18     316.2          24.3                3.4 +/-    2.04       6.7 +/-    2.04  0.030 / 0.030
G20     84.0           43.5                6.9 +/-    1.70       9.5 +/-    1.70  0.040 / 0.050
G21     152.0          24.3                6.8 +/-    3.23      13.4 +/-    3.23  0.040 / 0.050
G24     44.5           16.5                3.5 +/-    3.05       8.4 +/-    3.05  0.030 / 0.030
G27     242.2          23.7                6.5 +/-    2.40      13.1 +/-    2.40  0.020 / 0.020
G31     181.1          18.6                4.7 +/-    3.02      10.6 +/-    3.02  0.080 / 0.130
G32     274.1          71.9                6.7 +/-    0.35       7.0 +/-    0.35  0.080 / 0.170