PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/24-17:43:00
G07     33.7           67.9               10.9 +/-    0.57      11.6 +/-    0.57  0.030 / 0.040
G08     63.0           47.7               11.0 +/-    1.12      14.3 +/-    1.12  0.020 / 0.030
G09     180.9          51.3               13.6 +/-    0.81      16.8 +/-    0.81  0.060 / 0.140
G11     129.1          28.3               12.5 +/-    4.06      22.6 +/-    4.06  0.070 / 0.080
G18     112.7          10.2                3.5 +/-   31.16       9.7 +/-   31.16  0.050 / 0.050
G23     160.0          19.7               12.7 +/-    3.35      28.2 +/-    3.35  0.050 / 0.040
G27     41.3           18.8                9.4 +/-    1.56      21.3 +/-    1.56  0.230 / 0.180
G28     255.4          41.3               14.1 +/-    2.86      20.1 +/-    2.86  0.170 / 0.180
G30     321.5          52.0               10.5 +/-    0.81      12.9 +/-    0.81  0.200 / 0.300