PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-05:27:40
G10     260.5          35.1               10.0 +/-    1.57      15.8 +/-    1.57  0.110 / 0.080
G13     45.1           22.3                5.3 +/-    2.50      11.1 +/-    2.50  0.110 / 0.070
G15     65.9           52.1                6.2 +/-    1.52       7.6 +/-    1.52  0.040 / 0.040
G16     288.8          13.4                5.6 +/-    1.62      14.4 +/-    1.62  0.030 / 0.040
G20     286.4          57.3                7.4 +/-    1.78       8.6 +/-    1.78  0.120 / 0.210
G21     353.2          68.2                6.5 +/-    0.98       7.0 +/-    0.98  0.120 / 0.210
G24     125.0          10.5               -0.8 +/-   25.63      -2.2 +/-   25.63  0.070 / 0.240
G26     260.9          10.9                6.2 +/-    3.19      17.1 +/-    3.19  0.210 / 0.260
G27     321.6          12.3                4.2 +/-    2.28      11.2 +/-    2.28  0.180 / 0.370
G29     164.4          34.6                7.2 +/-    1.17      11.5 +/-    1.17  0.230 / 0.310