PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-03:58:00
G08     272.2          20.1               11.2 +/-    1.16      24.7 +/-    1.16  0.390 / 0.340
G10     51.1           60.2                8.5 +/-    0.63       9.7 +/-    0.63  0.520 / 0.270
G14     254.0          60.8                9.8 +/-    0.58      11.0 +/-    0.58  0.120 / 0.210
G18     314.8          27.1                7.6 +/-    2.02      14.2 +/-    2.02  0.140 / 0.250
G20     74.6           56.5               17.7 +/-    1.00      20.8 +/-    1.00  0.040 / 0.050
G21     154.0          21.3                8.0 +/-    1.35      17.0 +/-    1.35  0.060 / 0.050
G24     41.4           12.7                5.8 +/-    3.02      15.2 +/-    3.02  0.170 / 0.340
G27     235.9          19.5               10.6 +/-    4.10      23.6 +/-    4.10  0.120 / 0.130
G31     177.8          26.8                9.3 +/-    1.40      17.5 +/-    1.40  0.120 / 0.230
G32     326.5          76.1                9.1 +/-    0.48       9.3 +/-    0.48  0.100 / 0.220