PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/02-08:42:50
G08     299.6          21.0                4.2 +/-    1.60       8.9 +/-    1.60  0.050 / 0.110
G10     0.6            62.8                3.9 +/-    0.51       4.3 +/-    0.51  0.060 / 0.120
G14     227.3          39.6                7.4 +/-    1.53      10.9 +/-    1.53  0.080 / 0.120
G20     82.9           28.8                4.9 +/-    1.06       8.8 +/-    1.06  0.070 / 0.150
G21     145.0          43.3                8.0 +/-    1.02      11.0 +/-    1.02  0.050 / 0.170
G24     58.7           26.8                4.2 +/-    1.05       7.9 +/-    1.05  0.050 / 0.150
G27     257.0          32.9                6.1 +/-    2.18      10.0 +/-    2.18  0.030 / 0.030
G32     241.9          67.1                7.8 +/-    0.54       8.4 +/-    0.54  0.030 / 0.030