PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/11-09:57:30
G08     305.3          19.3                3.5 +/-    1.19       7.8 +/-    1.19  0.080 / 0.110
G10     349.7          62.1                3.8 +/-    0.38       4.3 +/-    0.38  0.080 / 0.090
G14     223.8          35.9                5.5 +/-    1.51       8.5 +/-    1.51  0.060 / 0.080
G20     84.0           21.4                3.4 +/-    1.70       7.2 +/-    1.70  0.080 / 0.090
G21     141.7          47.8                5.9 +/-    0.87       7.7 +/-    0.87  0.040 / 0.040
G24     64.0           28.6                3.5 +/-    0.93       6.3 +/-    0.93  0.040 / 0.050
G27     262.6          35.0                6.7 +/-    2.01      10.6 +/-    2.01  0.080 / 0.100
G32     233.7          62.5                5.3 +/-    1.35       5.9 +/-    1.35  0.060 / 0.090