PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/13-19:27:40
G02     39.8           49.9                8.2 +/-    1.21      10.4 +/-    1.21  0.030 / 0.030
G05     116.9          68.5                9.9 +/-    0.71      10.5 +/-    0.71  0.030 / 0.030
G12     185.5          53.3                9.6 +/-    0.58      11.6 +/-    0.58  0.040 / 0.050
G25     278.0          58.4                0.9 +/-    0.73       1.0 +/-    0.73  0.040 / 0.040
G29     313.3          34.2                7.0 +/-    0.83      11.3 +/-    0.83  0.040 / 0.040