PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/25-06:12:30
G10     246.7          23.1                8.2 +/-    1.53      16.7 +/-    1.53  0.160 / 0.630
G13     58.5           32.6                6.5 +/-    0.44      10.7 +/-    0.44  0.170 / 0.670
G15     95.1           57.5                7.5 +/-    0.55       8.8 +/-    0.55  0.100 / 0.200
G16     300.0          15.5                3.3 +/-    2.04       8.2 +/-    2.04  0.090 / 0.190
G20     321.3          73.0                6.4 +/-    0.94       6.7 +/-    0.94  0.060 / 0.040
G21     328.2          56.9                5.5 +/-    0.67       6.4 +/-    0.67  0.060 / 0.050
G26     271.2          17.4                5.3 +/-    2.14      12.4 +/-    2.14  0.030 / 0.110
G29     163.5          55.5                8.3 +/-    1.24       9.8 +/-    1.24  0.030 / 0.080