PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-03:27:30
G08     296.5          23.1                7.7 +/-    0.66      15.8 +/-    0.66  0.060 / 0.040
G10     354.5          62.5                6.3 +/-    0.58       7.0 +/-    0.58  0.030 / 0.030
G14     226.3          43.9                8.7 +/-    2.48      11.9 +/-    2.48  0.050 / 0.080
G18     54.9           54.9                7.2 +/-    0.63       8.6 +/-    0.63  0.060 / 0.110
G21     143.3          45.2               10.3 +/-    0.45      13.8 +/-    0.45  0.040 / 0.060
G24     62.1           28.4                6.1 +/-    1.32      11.0 +/-    1.32  0.040 / 0.060
G27     257.9          33.7               10.2 +/-    1.53      16.5 +/-    1.53  0.020 / 0.020
G32     237.4          62.7                8.2 +/-    1.45       9.1 +/-    1.45  0.020 / 0.020