PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/16-15:57:30
G02     239.8          74.7               13.0 +/-    0.71      13.4 +/-    0.71  0.080 / 0.100
G05     175.1          13.4               21.5 +/-    2.86      55.5 +/-    2.86  0.070 / 0.130
G06     40.7           59.3               11.2 +/-    0.42      12.8 +/-    0.42  0.040 / 0.060
G12     321.6          51.9               11.7 +/-    1.35      14.4 +/-    1.35  0.050 / 0.070
G17     72.8           19.9               10.5 +/-    0.96      23.2 +/-    0.96  0.150 / 0.470
G19     59.2           36.9               10.2 +/-    0.73      15.7 +/-    0.73  0.120 / 0.540
G24     247.1          35.0               13.7 +/-    0.93      21.7 +/-    0.93  0.060 / 0.160
G25     316.9          15.4                7.9 +/-    4.08      19.4 +/-    4.08  0.060 / 0.160