PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-01:57:40
G10     260.0          35.0               11.0 +/-    1.29      17.5 +/-    1.29  0.110 / 0.240
G13     45.3           22.5                6.8 +/-    2.39      14.2 +/-    2.39  0.140 / 0.290
G15     67.0           52.7                7.4 +/-    1.05       9.0 +/-    1.05  0.090 / 0.080
G16     287.3          14.0                6.7 +/-    1.43      17.0 +/-    1.43  0.130 / 0.090
G20     285.2          56.7                8.1 +/-    2.09       9.5 +/-    2.09  0.040 / 0.040
G21     348.8          67.0                8.4 +/-    0.58       9.0 +/-    0.58  0.040 / 0.040
G24     126.4          10.1               -9.6 +/-   32.07     -26.6 +/-   32.07  0.140 / 0.340
G26     260.0          11.2                9.6 +/-    5.32      26.0 +/-    5.32  0.130 / 0.330
G27     321.6          12.3                5.2 +/-    1.73      13.9 +/-    1.73  0.070 / 0.260
G29     165.2          37.2                9.4 +/-    0.66      14.4 +/-    0.66  0.160 / 0.340