PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-04:12:40
G08     275.1          21.5                8.0 +/-    1.17      17.0 +/-    1.17  0.030 / 0.020
G10     39.9           62.1                4.3 +/-    1.05       4.8 +/-    1.05  0.030 / 0.020
G11     315.5          12.9                4.9 +/-    3.00      12.8 +/-    3.00  0.160 / 0.240
G14     250.2          61.4                8.0 +/-    0.68       8.9 +/-    0.68  0.130 / 0.110
G18     80.7           43.8                5.8 +/-    1.08       7.9 +/-    1.08  0.110 / 0.190
G21     152.1          24.7                7.2 +/-    2.35      14.2 +/-    2.35  0.080 / 0.170
G24     45.1           18.1                5.0 +/-    2.91      11.4 +/-    2.91  0.030 / 0.020
G27     237.9          21.9                7.7 +/-    1.72      16.2 +/-    1.72  0.040 / 0.020
G31     180.2          20.6                8.2 +/-    0.94      17.8 +/-    0.94  0.130 / 0.130
G32     294.8          75.5                5.9 +/-    0.29       6.1 +/-    0.29  0.080 / 0.120