PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/14-18:57:50
G02     52.1           39.2                7.8 +/-    1.91      11.4 +/-    1.91  0.040 / 0.050
G05     72.5           67.1                8.8 +/-    0.38       9.5 +/-    0.38  0.050 / 0.060
G12     186.0          41.2                9.5 +/-    1.28      13.5 +/-    1.28  0.250 / 0.430
G13     132.3          10.2               -1.2 +/-   21.85      -3.3 +/-   21.85  0.270 / 0.550
G21     265.6          11.9                4.2 +/-   18.82      11.1 +/-   18.82  0.170 / 0.450
G25     250.7          56.2                7.8 +/-    1.96       9.1 +/-    1.96  0.210 / 0.390
G29     323.9          47.8                8.0 +/-    1.01      10.4 +/-    1.01  0.040 / 0.060