PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-13:12:50
G07     44.9           68.4                7.3 +/-    0.58       7.8 +/-    0.58  0.030 / 0.030
G08     54.2           41.9                6.2 +/-    1.65       8.8 +/-    1.65  0.020 / 0.030
G09     177.0          40.4                7.6 +/-    6.15      11.0 +/-    6.15  0.140 / 0.330
G11     120.8          31.0                6.5 +/-    1.61      11.2 +/-    1.61  0.230 / 0.350
G17     198.7          11.8                3.8 +/-   10.92      10.1 +/-   10.92  0.050 / 0.050
G23     161.0          14.3                8.2 +/-    8.76      20.8 +/-    8.76  0.040 / 0.050
G27     38.0           10.7                6.7 +/-    1.07      18.5 +/-    1.07  0.180 / 0.260
G28     268.3          49.8                0.0 +/-   31.75       0.0 +/-   31.75  0.100 / 0.250
G30     324.7          53.8                6.8 +/-    0.80       8.2 +/-    0.80  0.110 / 0.300