PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/03-18:58:00
G02     40.1           49.9               16.9 +/-    0.97      21.4 +/-    0.97  0.040 / 0.050
G05     135.0          67.7               22.6 +/-    0.49      24.2 +/-    0.49  0.030 / 0.050
G06     59.1           9.7                14.6 +/-    2.03      40.9 +/-    2.03  0.030 / 0.040
G12     191.9          57.3               23.1 +/-    0.57      26.9 +/-    0.57  0.030 / 0.050
G20     199.5          36.4               24.7 +/-    1.16      38.2 +/-    1.16  0.030 / 0.030
G25     274.3          59.9               21.0 +/-    1.46      23.9 +/-    1.46  0.020 / 0.030
G29     315.3          37.8               18.2 +/-    0.57      27.4 +/-    0.57  0.110 / 0.130