PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-02:28:00
G02     49.6           40.8                7.1 +/-    0.38      10.2 +/-    0.38  0.050 / 0.060
G05     84.7           68.1                8.7 +/-    0.37       9.3 +/-    0.37  0.050 / 0.060
G12     187.7          46.9               10.5 +/-    1.32      13.7 +/-    1.32  0.030 / 0.040
G25     262.6          57.8               11.2 +/-    0.83      12.9 +/-    0.83  0.030 / 0.040
G29     319.4          42.0               10.1 +/-    0.96      14.2 +/-    0.96  0.030 / 0.060