PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/18-02:12:30
G08     297.2          23.0                6.1 +/-    1.11      12.4 +/-    1.11  0.060 / 0.030
G10     353.2          62.4                6.5 +/-    0.57       7.2 +/-    0.57  0.040 / 0.050
G14     225.8          43.3                8.7 +/-    2.19      12.0 +/-    2.19  0.060 / 0.090
G18     54.7           54.8                8.0 +/-    0.96       9.5 +/-    0.96  0.060 / 0.080
G21     142.9          45.4                9.0 +/-    0.51      12.1 +/-    0.51  0.030 / 0.020
G24     62.7           28.6                7.1 +/-    1.10      12.8 +/-    1.10  0.030 / 0.020
G27     258.6          34.0               10.2 +/-    1.28      16.6 +/-    1.28  0.050 / 0.060
G32     236.3          61.5                7.5 +/-    1.27       8.5 +/-    1.27  0.050 / 0.060