PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-04:42:30
G05     47.4           19.6                3.5 +/-    2.23       7.7 +/-    2.23  0.060 / 0.060
G13     81.1           35.7                6.6 +/-    0.73      10.3 +/-    0.73  0.070 / 0.050
G15     129.0          49.5                7.3 +/-    1.22       9.3 +/-    1.22  0.300 / 0.320
G20     244.2          33.6                6.1 +/-    1.32       9.9 +/-    1.32  0.220 / 0.440
G21     310.5          45.3                5.7 +/-    0.91       7.6 +/-    0.91  0.050 / 0.110
G25     201.1          14.6                5.0 +/-    3.02      12.5 +/-    3.02  0.060 / 0.090
G26     295.1          19.2                3.4 +/-    1.50       7.6 +/-    1.50  0.220 / 0.280
G29     145.0          73.0                7.2 +/-    0.48       7.5 +/-    0.48  0.260 / 0.210