PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/14-17:57:40
G02     34.6           54.5               19.5 +/-    0.41      23.3 +/-    0.41  0.030 / 0.050
G05     145.4          62.5               22.8 +/-    0.46      25.3 +/-    0.46  0.030 / 0.040
G06     55.2           14.8               16.9 +/-    1.17      42.3 +/-    1.17  0.040 / 0.050
G12     197.3          65.1               18.0 +/-    1.29      19.7 +/-    1.29  0.040 / 0.060
G20     198.5          29.3               24.5 +/-    1.09      43.6 +/-    1.09  0.030 / 0.040
G25     288.9          57.5               19.9 +/-    1.04      23.1 +/-    1.04  0.030 / 0.030
G29     311.0          33.1               17.5 +/-    1.42      28.8 +/-    1.42  0.040 / 0.050