PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/19-16:27:30
G01     228.9          19.4               11.2 +/-    3.78      25.0 +/-    3.78  0.080 / 0.150
G03     287.3          69.6               10.2 +/-    1.06      10.8 +/-    1.06  0.080 / 0.140
G14     82.6           28.3               10.0 +/-    1.19      18.2 +/-    1.19  0.030 / 0.030
G16     149.1          42.1               14.4 +/-    0.96      20.2 +/-    0.96  0.030 / 0.030
G22     214.9          72.3               11.5 +/-    0.19      12.0 +/-    0.19  0.050 / 0.060
G23     306.4          37.4                9.6 +/-    1.04      14.6 +/-    1.04  0.040 / 0.050
G31     44.4           33.8                8.1 +/-    1.19      13.1 +/-    1.19  0.050 / 0.080