PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/21-17:27:30
G02     34.4           54.7               10.6 +/-    0.36      12.7 +/-    0.36  0.030 / 0.050
G05     145.4          62.1               11.9 +/-    0.48      13.3 +/-    0.48  0.030 / 0.050
G06     54.7           15.5                8.7 +/-    1.11      21.5 +/-    1.11  0.030 / 0.050
G12     198.3          65.9                9.8 +/-    1.15      10.6 +/-    1.15  0.040 / 0.050
G20     198.5          28.5               13.0 +/-    1.06      23.5 +/-    1.06  0.110 / 0.310
G25     290.4          57.0               10.8 +/-    0.63      12.7 +/-    0.63  0.160 / 0.350
G29     310.7          32.9                8.5 +/-    1.48      14.0 +/-    1.48  0.100 / 0.180