PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-03:27:50
G08     270.6          19.7                9.3 +/-    1.94      20.5 +/-    1.94  0.120 / 0.420
G10     53.6           59.8                7.8 +/-    0.68       8.8 +/-    0.68  0.130 / 0.340
G14     256.5          61.9               10.6 +/-    1.10      11.9 +/-    1.10  0.150 / 0.270
G18     314.3          28.3                5.5 +/-    1.69      10.0 +/-    1.69  0.200 / 0.330
G20     70.7           59.7                9.6 +/-    0.75      11.0 +/-    0.75  0.050 / 0.050
G21     154.3          20.2                8.4 +/-    2.41      18.3 +/-    2.41  0.050 / 0.050
G24     40.8           11.8                6.5 +/-    2.15      17.5 +/-    2.15  0.290 / 0.270
G27     235.0          18.7               10.6 +/-    5.13      24.1 +/-    5.13  0.200 / 0.250
G31     177.5          28.0               10.4 +/-    1.46      19.0 +/-    1.46  0.120 / 0.290
G32     331.6          75.6                9.3 +/-    0.37       9.6 +/-    0.37  0.110 / 0.280