PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/13-15:57:40
G02     228.4          69.6               10.0 +/-    0.71      10.6 +/-    0.71  0.150 / 0.000
G06     43.1           64.9                9.1 +/-    0.46       9.9 +/-    0.46  0.280 / 0.320
G12     321.3          46.4                9.9 +/-    0.65      13.1 +/-    0.65  0.040 / 0.050
G17     68.3           23.3                9.0 +/-    1.80      18.3 +/-    1.80  0.040 / 0.040
G19     53.7           40.4                9.1 +/-    1.52      13.2 +/-    1.52  0.070 / 0.100
G24     253.5          37.8               10.8 +/-    2.88      16.4 +/-    2.88  0.060 / 0.100
G25     315.8          10.8              -13.0 +/-   27.08     -35.7 +/-   27.08  0.070 / 0.060