PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/06-19:58:10
G07     18.2           68.5               13.8 +/-    0.48      14.7 +/-    0.48  0.040 / 0.040
G08     66.1           51.1               11.5 +/-    1.28      14.3 +/-    1.28  0.040 / 0.050
G09     180.5          48.8               14.8 +/-    1.58      19.0 +/-    1.58  0.040 / 0.050
G11     131.1          27.8               16.6 +/-    1.18      30.4 +/-    1.18  0.040 / 0.040
G18     114.0          10.8               18.1 +/-    3.79      49.5 +/-    3.79  0.290 / 0.410
G23     158.9          14.8               17.5 +/-    1.27      43.7 +/-    1.27  0.210 / 0.360
G27     39.7           15.5               10.5 +/-    1.45      25.8 +/-    1.45  0.200 / 0.340
G28     261.2          46.8               14.6 +/-    4.22      19.2 +/-    4.22  0.160 / 0.360
G30     323.9          53.6               13.2 +/-    0.42      16.0 +/-    0.42  0.120 / 0.120