PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/18-17:27:40
G01     318.1          21.8                8.0 +/-    1.98      16.8 +/-    1.98  0.040 / 0.040
G08     255.3          12.9               10.6 +/-    1.72      27.8 +/-    1.72  0.040 / 0.050
G10     83.0           50.3               12.1 +/-    0.73      15.1 +/-    0.73  0.040 / 0.030
G11     305.5          20.3                8.5 +/-    1.58      18.5 +/-    1.58  0.040 / 0.040
G14     289.6          68.9               11.5 +/-    0.66      12.2 +/-    0.66  0.180 / 0.280
G20     108.0          24.8               11.9 +/-    1.87      23.4 +/-    1.87  0.200 / 0.250
G31     176.2          42.5               14.2 +/-    1.25      19.9 +/-    1.25  0.060 / 0.070
G32     13.9           65.5               10.3 +/-    0.41      11.2 +/-    0.41  0.060 / 0.050