PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/25-11:27:50
G01     238.4          27.5                6.3 +/-    1.46      11.7 +/-    1.46  0.050 / 0.080
G03     309.7          57.1                3.7 +/-    1.66       4.3 +/-    1.66  0.060 / 0.080
G14     70.1           37.0                4.4 +/-    1.11       6.7 +/-    1.11  0.090 / 0.120
G16     155.0          31.4                6.8 +/-    1.13      11.6 +/-    1.13  0.080 / 0.130
G18     212.9          17.9                4.4 +/-    3.06      10.2 +/-    3.06  0.030 / 0.020
G22     258.6          77.2                5.8 +/-    0.72       6.0 +/-    0.72  0.030 / 0.030
G23     298.2          30.7                6.0 +/-    1.21      10.3 +/-    1.21  0.110 / 0.170
G26     118.8          48.0                5.8 +/-    0.62       7.5 +/-    0.62  0.090 / 0.110
G31     41.6           43.5                3.0 +/-    1.47       4.1 +/-    1.47  0.070 / 0.110
G32     88.5           13.6                2.9 +/-    4.28       7.4 +/-    4.28  0.070 / 0.110