PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/14-17:57:30
G02     34.6           54.5               18.7 +/-    0.90      22.3 +/-    0.90  0.160 / 0.200
G05     145.4          62.5               22.2 +/-    0.48      24.7 +/-    0.48  0.200 / 0.160
G06     55.2           14.8               17.1 +/-    2.58      42.7 +/-    2.58  0.030 / 0.040
G12     197.3          65.1               18.4 +/-    0.55      20.0 +/-    0.55  0.040 / 0.050
G20     198.5          29.3               22.7 +/-    1.80      40.4 +/-    1.80  0.030 / 0.040
G25     288.9          57.5               18.1 +/-    0.66      21.0 +/-    0.66  0.030 / 0.040
G29     311.0          33.1               16.5 +/-    1.09      27.2 +/-    1.09  0.020 / 0.030