PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/29-13:28:00
G01     128.7          10.1              -16.2 +/-   30.61     -45.0 +/-   30.61  0.230 / 0.310
G07     53.9           68.0               -2.5 +/-    4.23      -2.6 +/-    4.23  0.110 / 0.350
G08     51.5           39.7                4.5 +/-    1.53       6.6 +/-    1.53  0.030 / 0.050
G09     176.8          37.2               -5.0 +/-   10.28      -7.6 +/-   10.28  0.050 / 0.040
G11     117.7          32.7                4.6 +/-    2.86       7.7 +/-    2.86  0.210 / 0.450
G17     198.9          14.7                4.7 +/-    4.50      11.9 +/-    4.50  0.030 / 0.030
G23     161.0          11.3               18.3 +/-   14.19      49.7 +/-   14.19  0.030 / 0.030
G28     272.8          51.5              -78.7 +/-   46.72     -97.5 +/-   46.72  0.120 / 0.290
G30     327.7          56.3                5.1 +/-    0.94       5.9 +/-    0.94  0.180 / 0.250