PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-01:42:50
G02     43.6           46.2                9.9 +/-    0.58      13.1 +/-    0.58  0.030 / 0.050
G05     107.5          68.6               12.1 +/-    0.58      12.9 +/-    0.58  0.030 / 0.050
G12     190.0          55.0               12.5 +/-    0.48      14.8 +/-    0.48  0.030 / 0.030
G25     277.9          57.7               17.7 +/-    1.12      20.5 +/-    1.12  0.030 / 0.020
G29     314.6          35.8               10.0 +/-    1.18      15.6 +/-    1.18  0.040 / 0.030