PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/17-10:42:30
G08     299.8          22.7                4.2 +/-    0.88       8.6 +/-    0.88  0.050 / 0.060
G10     353.6          62.3                4.7 +/-    0.51       5.2 +/-    0.51  0.040 / 0.060
G14     223.6          40.7                7.5 +/-    2.06      10.8 +/-    2.06  0.110 / 0.040
G20     54.7           55.9                5.6 +/-    1.01       6.6 +/-    1.01  0.090 / 0.050
G21     141.9          44.4                7.5 +/-    0.55      10.2 +/-    0.55  0.140 / 0.140
G24     61.6           27.1                3.1 +/-    1.32       5.8 +/-    1.32  0.090 / 0.130
G27     265.2          34.9                8.0 +/-    2.19      12.8 +/-    2.19  0.020 / 0.030
G32     232.2          56.8                7.4 +/-    1.94       8.6 +/-    1.94  0.040 / 0.020