PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/20-20:57:50
G01     309.3          31.8                9.2 +/-    1.26      15.5 +/-    1.26  0.030 / 0.040
G10     103.5          41.1                9.5 +/-    0.92      13.6 +/-    0.92  0.030 / 0.040
G11     283.0          28.4                9.0 +/-    0.59      16.3 +/-    0.59  0.070 / 0.150
G14     352.2          68.0                8.1 +/-    0.61       8.6 +/-    0.61  0.080 / 0.130
G20     118.9          15.8               10.9 +/-    1.71      26.6 +/-    1.71  0.070 / 0.110
G22     308.8          23.1                9.8 +/-    2.58      20.1 +/-    2.58  0.080 / 0.110
G25     79.8           14.9                8.3 +/-    2.29      20.8 +/-    2.29  0.150 / 0.180
G31     172.2          60.4               11.5 +/-    0.70      13.0 +/-    0.70  0.120 / 0.200
G32     33.2           54.4                8.3 +/-    1.18       9.9 +/-    1.18  0.040 / 0.050