PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/14-19:42:40
G01     318.1          19.7                8.2 +/-    1.78      18.1 +/-    1.78  0.170 / 0.240
G08     255.5          12.0                8.3 +/-   19.93      22.2 +/-   19.93  0.250 / 0.310
G10     82.7           52.5                8.3 +/-    1.16      10.1 +/-    1.16  0.050 / 0.070
G11     301.6          23.8                7.9 +/-    1.94      15.8 +/-    1.94  0.040 / 0.040
G14     305.0          71.0                8.5 +/-    0.54       8.9 +/-    0.54  0.030 / 0.020
G18     104.4          26.0                7.8 +/-    1.62      14.8 +/-    1.62  0.040 / 0.020
G22     301.5          11.6                4.5 +/-   11.58      12.2 +/-   11.58  0.070 / 0.040
G31     177.2          43.1               10.8 +/-    1.57      14.9 +/-    1.57  0.070 / 0.050
G32     9.6            66.4                8.0 +/-    0.45       8.6 +/-    0.45  0.260 / 0.300