PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/08-20:27:30
G02     32.0           56.6               12.0 +/-    1.19      14.0 +/-    1.19  0.050 / 0.040
G05     144.9          62.2               14.9 +/-    0.46      16.6 +/-    0.46  0.040 / 0.060
G06     55.2           14.3                9.6 +/-    2.09      24.4 +/-    2.09  0.040 / 0.040
G12     195.6          64.9               13.2 +/-    0.83      14.4 +/-    0.83  0.030 / 0.040
G20     198.0          29.4               18.0 +/-    2.29      32.0 +/-    2.29  0.050 / 0.050
G25     287.5          58.6               12.8 +/-    3.96      14.7 +/-    3.96  0.040 / 0.040
G29     309.7          31.2               12.3 +/-    2.42      21.1 +/-    2.42  0.120 / 0.130