PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-22:28:00
G01     242.9          30.7               10.5 +/-    1.81      18.2 +/-    1.81  0.040 / 0.030
G03     313.3          51.0                8.8 +/-    0.86      11.0 +/-    0.86  0.030 / 0.030
G14     68.4           35.9                9.6 +/-    1.25      15.0 +/-    1.25  0.040 / 0.040
G16     162.6          23.4               11.8 +/-    0.91      24.0 +/-    0.91  0.040 / 0.040
G22     291.0          71.7               10.5 +/-    0.62      11.0 +/-    0.62  0.090 / 0.200
G23     292.1          23.5               10.0 +/-    1.52      20.2 +/-    1.52  0.080 / 0.220
G26     131.1          43.7               13.4 +/-    0.64      18.4 +/-    0.64  0.060 / 0.100
G31     39.7           52.8               10.1 +/-    0.64      12.3 +/-    0.64  0.050 / 0.100
G32     83.5           18.9                8.9 +/-    2.51      20.0 +/-    2.51  0.080 / 0.100