PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-08:42:40
G08     306.8          19.1                6.1 +/-    1.20      13.7 +/-    1.20  0.090 / 0.200
G10     344.7          61.6                5.2 +/-    0.60       5.8 +/-    0.60  0.070 / 0.190
G14     222.2          33.0                6.2 +/-    1.35      10.2 +/-    1.35  0.030 / 0.040
G20     77.5           31.4                5.2 +/-    0.30       8.8 +/-    0.30  0.030 / 0.030
G21     140.0          50.7                7.4 +/-    1.47       9.2 +/-    1.47  0.070 / 0.110
G24     66.5           29.1                4.2 +/-    0.63       7.4 +/-    0.63  0.060 / 0.100
G27     265.7          35.9                8.2 +/-    1.35      12.8 +/-    1.35  0.050 / 0.110
G32     230.5          60.4                9.7 +/-    0.68      10.9 +/-    0.68  0.050 / 0.090