PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/20-17:57:40
G01     304.6          34.8                8.7 +/-    1.16      13.9 +/-    1.16  0.080 / 0.120
G10     108.8          38.5               24.3 +/-    0.68      36.2 +/-    0.68  0.050 / 0.090
G11     280.7          27.6                7.3 +/-    0.99      13.4 +/-    0.99  0.080 / 0.110
G14     1.2            65.8                8.5 +/-    0.59       9.3 +/-    0.59  0.100 / 0.140
G18     119.6          10.2               13.1 +/-    2.17      36.4 +/-    2.17  0.070 / 0.110
G22     310.7          28.4                7.8 +/-    0.84      14.1 +/-    0.84  0.070 / 0.110
G25     79.7           17.4               11.1 +/-    1.35      26.0 +/-    1.35  0.030 / 0.040
G31     164.4          68.0               10.8 +/-    0.37      11.5 +/-    0.37  0.030 / 0.030
G32     39.2           50.4                9.8 +/-    1.62      12.3 +/-    1.62  0.050 / 0.040