PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/11-21:42:50
G02     40.9           48.9               10.2 +/-    1.06      13.0 +/-    1.06  0.030 / 0.030
G05     114.7          68.5               12.0 +/-    0.51      12.8 +/-    0.51  0.030 / 0.030
G12     187.3          54.5               12.9 +/-    0.51      15.5 +/-    0.51  0.040 / 0.040
G25     278.9          58.0               10.8 +/-    1.65      12.5 +/-    1.65  0.040 / 0.050
G29     313.5          34.4               10.0 +/-    0.92      16.1 +/-    0.92  0.030 / 0.050