PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-16:58:30
G07     333.4          58.7                9.6 +/-    1.11      11.0 +/-    1.11  0.110 / 0.220
G08     108.1          49.4               11.9 +/-    0.70      15.1 +/-    0.70  0.090 / 0.170
G09     214.8          80.5               10.9 +/-    1.06      11.1 +/-    1.06  0.030 / 0.060
G11     148.6          10.3               -3.2 +/-   23.96      -8.9 +/-   23.96  0.040 / 0.040
G16     44.7           15.1                8.1 +/-    1.99      20.2 +/-    1.99  0.080 / 0.140
G23     153.1          48.4               12.0 +/-    1.00      15.4 +/-    1.00  0.080 / 0.120
G27     63.3           35.5                9.0 +/-    0.35      14.1 +/-    0.35  0.050 / 0.080
G28     231.6          20.3               12.5 +/-    2.55      27.3 +/-    2.55  0.050 / 0.080
G30     297.8          32.5                8.3 +/-    1.10      13.8 +/-    1.10  0.120 / 0.490