PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/23-01:27:10
G02     49.8           40.7                8.2 +/-    0.66      11.8 +/-    0.66  0.030 / 0.080
G05     83.3           68.0               10.2 +/-    0.51      10.9 +/-    0.51  0.030 / 0.070
G12     187.0          45.8               12.6 +/-    1.83      16.8 +/-    1.83  0.030 / 0.040
G25     261.1          57.8               11.9 +/-    0.84      13.8 +/-    0.84  0.030 / 0.040
G29     319.6          42.3               11.3 +/-    1.04      15.8 +/-    1.04  0.050 / 0.070