PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/20-18:27:50
G01     317.0          22.8                8.8 +/-    1.45      18.2 +/-    1.45  0.200 / 0.120
G10     88.5           49.2               10.8 +/-    1.31      13.7 +/-    1.31  0.190 / 0.120
G11     296.4          26.1               10.0 +/-    1.32      19.0 +/-    1.32  0.050 / 0.040
G14     317.6          71.5                9.5 +/-    0.61      10.0 +/-    0.61  0.050 / 0.040
G18     295.6          46.9                7.9 +/-    8.20      10.4 +/-    8.20  0.030 / 0.040
G20     110.2          24.8               10.5 +/-    2.05      20.6 +/-    2.05  0.040 / 0.040
G22     303.7          14.3                7.8 +/-    1.73      19.7 +/-    1.73  0.140 / 0.180
G25     90.7           10.5               -8.2 +/-   37.39     -22.5 +/-   37.39  0.150 / 0.260
G31     178.3          44.9               12.9 +/-    0.71      17.4 +/-    0.71  0.320 / 0.230
G32     15.4           64.1                9.4 +/-    0.58      10.3 +/-    0.58  0.270 / 0.240