PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-13:13:10
G01     220.4          11.8                6.5 +/-    1.41      17.5 +/-    1.41  0.040 / 0.050
G03     249.0          72.2                7.5 +/-    0.60       7.9 +/-    0.60  0.030 / 0.050
G09     298.0          11.2              -10.3 +/-   23.89     -27.9 +/-   23.89  0.150 / 0.250
G14     93.0           19.0                6.5 +/-    1.25      14.7 +/-    1.25  0.140 / 0.270
G16     143.6          50.3                8.5 +/-    0.99      10.7 +/-    0.99  0.040 / 0.030
G22     195.6          61.0                7.8 +/-    0.77       8.8 +/-    0.77  0.040 / 0.040
G23     313.2          43.2                5.0 +/-    0.80       6.9 +/-    0.80  0.040 / 0.050
G26     87.1           55.4                6.7 +/-    1.16       7.9 +/-    1.16  0.040 / 0.050
G31     48.4           26.3                4.4 +/-    3.04       8.3 +/-    3.04  0.150 / 0.240