PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-00:42:30
G02     27.7           60.1                9.7 +/-    0.61      11.0 +/-    0.61  0.030 / 0.030
G05     146.1          57.0               12.6 +/-    0.45      14.7 +/-    0.45  0.030 / 0.030
G06     50.7           20.1                9.4 +/-    2.42      20.5 +/-    2.42  0.030 / 0.030
G12     209.0          74.1               11.6 +/-    0.32      12.0 +/-    0.32  0.030 / 0.030
G19     94.4           15.0               12.6 +/-    1.35      31.3 +/-    1.35  0.080 / 0.060
G25     305.5          48.3               10.1 +/-    2.81      13.0 +/-    2.81  0.100 / 0.110
G29     302.4          22.6               10.3 +/-    1.58      21.4 +/-    1.58  0.120 / 0.200