PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-20:42:50
G05     53.0           10.9               12.4 +/-    1.81      34.0 +/-    1.81  0.160 / 0.240
G10     244.6          20.5               17.4 +/-    1.49      37.8 +/-    1.49  0.160 / 0.260
G13     62.5           34.9               13.2 +/-    0.87      21.0 +/-    0.87  0.050 / 0.060
G15     102.2          57.3               15.7 +/-    0.54      18.3 +/-    0.54  0.050 / 0.050
G16     306.5          13.4               13.1 +/-    1.18      33.9 +/-    1.18  0.120 / 0.360
G18     259.0          51.3               16.1 +/-    1.06      20.0 +/-    1.06  0.130 / 0.380
G20     37.6           54.9               13.9 +/-    0.64      16.6 +/-    0.64  0.030 / 0.060
G21     326.6          56.3               13.6 +/-    0.87      16.0 +/-    0.87  0.040 / 0.050
G26     279.0          17.5               14.3 +/-    1.35      33.5 +/-    1.35  0.090 / 0.240
G29     160.2          53.8               15.3 +/-    1.31      18.4 +/-    1.31  0.130 / 0.320