PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/20-20:42:50
G08     270.8          19.6               11.9 +/-    1.51      26.4 +/-    1.51  0.200 / 0.180
G10     52.1           60.4               10.3 +/-    0.32      11.7 +/-    0.32  0.210 / 0.180
G11     314.0          14.6               10.5 +/-    2.22      26.4 +/-    2.22  0.150 / 0.430
G14     259.3          64.2               12.6 +/-    1.16      13.8 +/-    1.16  0.150 / 0.420
G18     88.5           37.8               12.3 +/-    0.81      18.5 +/-    0.81  0.110 / 0.170
G21     152.5          15.4               14.2 +/-    2.97      35.0 +/-    2.97  0.110 / 0.500
G24     42.0           14.2               10.9 +/-    4.30      27.5 +/-    4.30  0.080 / 0.110
G27     233.7          18.2               12.9 +/-    3.33      29.6 +/-    3.33  0.080 / 0.140
G31     181.2          23.7               12.5 +/-    2.86      25.1 +/-    2.86  0.070 / 0.040
G32     315.5          75.3               11.1 +/-    0.72      11.5 +/-    0.72  0.070 / 0.050