PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/22-20:27:50
G07     345.7          62.1               13.4 +/-    0.64      14.9 +/-    0.64  0.150 / 0.120
G08     90.3           54.3               12.9 +/-    0.83      15.5 +/-    0.83  0.110 / 0.120
G09     185.6          65.4               14.6 +/-    0.61      15.9 +/-    0.61  0.150 / 0.110
G11     142.4          17.8               13.3 +/-    1.81      30.8 +/-    1.81  0.110 / 0.100
G23     156.9          30.1               14.1 +/-    1.67      24.6 +/-    1.67  0.060 / 0.130
G27     47.6           26.2               10.4 +/-    1.51      19.9 +/-    1.51  0.080 / 0.120
G28     244.9          36.6               14.7 +/-    1.35      22.7 +/-    1.35  0.020 / 0.030
G30     310.8          43.2               12.6 +/-    0.94      17.4 +/-    0.94  0.030 / 0.030