PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-19:13:00
G02     229.7          68.0               12.9 +/-    0.53      13.8 +/-    0.53  0.050 / 0.030
G05     175.8          10.5               -2.7 +/-   29.66      -7.5 +/-   29.66  0.050 / 0.040
G06     42.5           62.1              -18.4 +/-   19.60     -20.5 +/-   19.60  0.030 / 0.040
G12     321.9          49.3               11.2 +/-    0.89      14.2 +/-    0.89  0.040 / 0.050
G17     69.4           22.4               17.9 +/-   10.35      37.1 +/-   10.35  0.140 / 0.220
G19     55.1           39.4              -47.4 +/-   52.06     -69.6 +/-   52.06  0.170 / 0.340
G24     251.9          37.3               13.3 +/-    2.40      20.3 +/-    2.40  0.060 / 0.090
G25     316.2          13.3               10.2 +/-    3.31      26.5 +/-    3.31  0.060 / 0.080