PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/25-21:13:10
G02     51.1           40.3                6.6 +/-    1.06       9.6 +/-    1.06  0.030 / 0.030
G05     76.5           67.6                7.4 +/-    0.43       7.9 +/-    0.43  0.020 / 0.030
G12     183.7          39.8                9.1 +/-    0.73      13.3 +/-    0.73  0.120 / 0.340
G21     263.8          10.7               -5.1 +/-   11.07     -14.1 +/-   11.07  0.040 / 0.060
G25     251.9          57.0                5.5 +/-    1.93       6.4 +/-    1.93  0.040 / 0.040
G29     321.6          44.9                7.4 +/-    0.94      10.0 +/-    0.94  0.040 / 0.060