PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/12-20:57:30
G01     228.9          19.4               12.0 +/-    2.83      26.8 +/-    2.83  0.030 / 0.020
G03     292.9          66.6                9.8 +/-    0.94      10.6 +/-    0.94  0.030 / 0.030
G14     83.6           26.6                9.1 +/-    1.97      17.1 +/-    1.97  0.050 / 0.080
G16     152.2          40.7               14.3 +/-    0.81      20.6 +/-    0.81  0.040 / 0.080
G22     225.5          73.1               12.3 +/-    0.65      12.8 +/-    0.65  0.070 / 0.080
G23     304.9          35.0                9.1 +/-    1.21      14.5 +/-    1.21  0.050 / 0.070
G26     104.9          53.6               11.5 +/-    0.82      13.9 +/-    0.82  0.240 / 0.440
G31     43.7           35.8                7.9 +/-    1.42      12.3 +/-    1.42  0.200 / 0.310