PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/07-18:57:40
G07     38.7           68.1               11.4 +/-    0.63      12.2 +/-    0.63  0.030 / 0.030
G08     59.5           45.8               10.9 +/-    1.20      14.5 +/-    1.20  0.030 / 0.030
G09     180.2          48.4               14.1 +/-    0.82      18.1 +/-    0.82  0.120 / 0.220
G11     126.8          29.8               15.6 +/-    1.22      27.5 +/-    1.22  0.120 / 0.210
G18     110.3          11.5               13.9 +/-    1.67      37.4 +/-    1.67  0.140 / 0.160
G23     160.5          17.9               12.8 +/-    1.35      29.6 +/-    1.35  0.120 / 0.110
G27     40.3           17.0                8.8 +/-    2.56      20.8 +/-    2.56  0.040 / 0.050
G28     258.4          43.2               13.1 +/-    1.94      18.1 +/-    1.94  0.050 / 0.060
G30     323.3          53.4               10.7 +/-    0.58      13.0 +/-    0.58  0.050 / 0.050