PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/17-19:57:50
G01     244.2          31.5                8.8 +/-    1.69      14.9 +/-    1.69  0.030 / 0.040
G03     313.6          51.5                7.7 +/-    0.75       9.6 +/-    0.75  0.040 / 0.040
G14     66.6           37.4                8.0 +/-    1.53      12.2 +/-    1.53  0.080 / 0.160
G16     161.6          23.3               10.3 +/-    0.99      21.0 +/-    0.99  0.080 / 0.160
G22     292.5          71.7                7.5 +/-    1.28       7.9 +/-    1.28  0.100 / 0.100
G23     291.7          23.6                7.6 +/-    1.78      15.3 +/-    1.78  0.090 / 0.100
G26     130.4          43.1                9.6 +/-    0.47      13.4 +/-    0.47  0.050 / 0.060
G31     40.1           52.3                6.9 +/-    0.61       8.5 +/-    0.61  0.050 / 0.050
G32     82.9           18.8                7.4 +/-    2.38      16.8 +/-    2.38  0.170 / 0.130