PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-08:42:30
G08     308.5          18.4                5.0 +/-    1.73      11.4 +/-    1.73  0.090 / 0.110
G10     340.9          61.2                4.5 +/-    0.65       5.1 +/-    0.65  0.060 / 0.110
G14     221.1          31.4                6.1 +/-    2.85      10.4 +/-    2.85  0.110 / 0.170
G20     76.1           32.1                3.6 +/-    2.02       6.0 +/-    2.02  0.100 / 0.190
G21     138.6          52.5                8.5 +/-    1.02      10.4 +/-    1.02  0.100 / 0.040
G24     68.5           29.4                5.5 +/-    2.08       9.7 +/-    2.08  0.060 / 0.040
G27     268.0          36.4                7.9 +/-    1.11      12.1 +/-    1.11  0.040 / 0.040
G32     228.2          58.6                6.4 +/-    1.81       7.3 +/-    1.81  0.040 / 0.050