PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-04:12:50
G08     271.1          19.6               10.2 +/-    1.11      22.6 +/-    1.11  0.100 / 0.320
G10     53.6           59.8                4.3 +/-    0.46       4.9 +/-    0.46  0.130 / 0.360
G14     256.1          61.5                7.4 +/-    0.77       8.3 +/-    0.77  0.040 / 0.070
G18     314.3          28.2                9.4 +/-    1.96      17.1 +/-    1.96  0.050 / 0.050
G20     78.6           54.3                8.5 +/-    0.34      10.3 +/-    0.34  0.090 / 0.230
G21     154.2          20.1                7.1 +/-    1.04      15.6 +/-    1.04  0.100 / 0.320
G24     40.8           11.9                4.8 +/-    1.73      12.9 +/-    1.73  0.030 / 0.030
G27     235.0          18.6               11.5 +/-    1.36      26.1 +/-    1.36  0.030 / 0.030
G31     177.5          28.0                9.4 +/-    1.68      17.1 +/-    1.68  0.220 / 0.210
G32     331.6          75.6                7.0 +/-    0.55       7.2 +/-    0.55  0.150 / 0.250