PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-16:13:10
G02     223.0          65.5               15.0 +/-    0.93      16.3 +/-    0.93  0.060 / 0.040
G06     46.4           68.5               12.3 +/-    0.40      13.1 +/-    0.40  0.060 / 0.050
G12     320.7          42.8               11.2 +/-    0.68      15.5 +/-    0.68  0.080 / 0.090
G17     65.2           25.6               11.3 +/-    1.58      21.8 +/-    1.58  0.060 / 0.080
G19     49.7           42.8               12.7 +/-    1.28      17.6 +/-    1.28  0.030 / 0.060
G24     258.3          39.4               13.4 +/-    2.35      19.7 +/-    2.35  0.030 / 0.050