PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/19-19:57:50
G07     14.9           67.1               11.9 +/-    0.83      12.8 +/-    0.83  0.030 / 0.030
G08     69.8           49.6               11.9 +/-    0.73      15.1 +/-    0.73  0.030 / 0.030
G09     181.7          57.1               13.0 +/-    1.10      15.2 +/-    1.10  0.070 / 0.140
G11     133.4          24.5               13.9 +/-    1.21      27.5 +/-    1.21  0.060 / 0.110
G23     159.8          26.4               11.1 +/-    1.50      21.0 +/-    1.50  0.030 / 0.030
G27     44.4           23.4                9.7 +/-    1.81      19.6 +/-    1.81  0.040 / 0.030
G28     249.8          37.9               14.0 +/-    2.14      21.1 +/-    2.14  0.050 / 0.050
G30     315.3          46.7               12.0 +/-    0.86      15.8 +/-    0.86  0.070 / 0.050