PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-16:27:20
G07     310.9          50.4               13.7 +/-    1.33      17.2 +/-    1.33  0.030 / 0.050
G08     128.7          39.4               15.2 +/-    0.96      22.4 +/-    0.96  0.050 / 0.060
G09     309.5          75.7               13.2 +/-    1.12      13.6 +/-    1.12  0.050 / 0.060
G16     42.0           29.1               10.0 +/-    1.55      17.8 +/-    1.55  0.030 / 0.060
G23     142.5          65.7               15.1 +/-    1.00      16.4 +/-    1.00  0.110 / 0.200
G27     83.9           37.6               13.2 +/-    0.58      20.0 +/-    0.58  0.100 / 0.190
G30     285.1          22.4               13.3 +/-    2.06      27.6 +/-    2.06  0.030 / 0.040