PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/12-21:12:30
G01     224.0          14.7               11.9 +/-    2.71      29.9 +/-    2.71  0.030 / 0.040
G03     274.8          69.9                9.1 +/-    0.87       9.7 +/-    0.87  0.030 / 0.030
G14     89.5           22.5                8.4 +/-    0.82      17.4 +/-    0.82  0.060 / 0.080
G16     146.9          47.5               13.4 +/-    0.89      17.5 +/-    0.89  0.090 / 0.120
G22     209.0          67.8               11.5 +/-    0.38      12.3 +/-    0.38  0.030 / 0.060
G23     309.9          39.8                9.1 +/-    0.92      13.3 +/-    0.92  0.030 / 0.060
G26     92.2           54.9               10.2 +/-    0.68      12.2 +/-    0.68  0.220 / 0.550
G31     46.3           30.0                7.5 +/-    1.35      13.1 +/-    1.35  0.300 / 0.380