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               11.9 +/-    1.42      26.5 +/-    1.42  0.030 / 0.030
G03     292.9          66.6                9.4 +/-    1.22      10.1 +/-    1.22  0.030 / 0.030
G14     83.6           26.6               10.2 +/-    1.51      19.2 +/-    1.51  0.100 / 0.220
G16     152.2          40.7               16.7 +/-    0.91      24.1 +/-    0.91  0.140 / 0.250
G22     225.5          73.1               11.8 +/-    0.78      12.3 +/-    0.78  0.040 / 0.080
G23     304.9          35.0               10.3 +/-    1.60      16.3 +/-    1.60  0.040 / 0.080
G26     104.9          53.6               12.4 +/-    0.47      14.9 +/-    0.47  0.060 / 0.090
G31     43.7           35.8                7.6 +/-    1.07      11.8 +/-    1.07  0.060 / 0.070