PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/19-06:12:20
G07     312.5          50.2                5.3 +/-    0.82       6.6 +/-    0.82  0.040 / 0.050
G08     127.4          42.4                8.0 +/-    0.40      11.3 +/-    0.40  0.040 / 0.050
G09     285.1          82.6                8.1 +/-    0.58       8.2 +/-    0.58  0.050 / 0.070
G16     42.8           19.7                2.8 +/-    2.51       6.2 +/-    2.51  0.050 / 0.060
G23     146.4          58.6                7.7 +/-    0.52       8.9 +/-    0.52  0.040 / 0.030
G27     75.5           37.0                6.5 +/-    1.02      10.0 +/-    1.02  0.030 / 0.030
G30     287.8          23.0                6.5 +/-    1.37      13.3 +/-    1.37  0.170 / 0.340