PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-07:27:50
G10     287.0          48.6                5.5 +/-    3.05       7.0 +/-    3.05  0.050 / 0.040
G15     47.8           34.0                4.9 +/-    1.37       8.0 +/-    1.37  0.050 / 0.030
G20     333.8          65.0                6.2 +/-    0.64       6.8 +/-    0.64  0.110 / 0.040
G21     71.8           75.8                7.3 +/-    0.69       7.5 +/-    0.69  0.110 / 0.080
G24     104.7          23.0                6.4 +/-    1.14      13.1 +/-    1.14  0.080 / 0.080
G27     309.6          28.9                4.4 +/-    1.16       8.0 +/-    1.16  0.070 / 0.110
G29     166.1          11.1                4.3 +/-    1.87      11.7 +/-    1.87  0.050 / 0.100
G32     208.7          19.0                7.0 +/-    1.73      15.9 +/-    1.73  0.050 / 0.060