PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/25-16:57:50
G08     309.1          19.0                6.1 +/-    1.26      13.7 +/-    1.26  0.110 / 0.080
G10     332.6          60.0                5.5 +/-    0.46       6.2 +/-    0.46  0.080 / 0.060
G14     218.8          31.6                7.1 +/-    2.18      12.1 +/-    2.18  0.070 / 0.070
G18     43.4           57.7                7.7 +/-    0.81       9.0 +/-    0.81  0.050 / 0.050
G21     135.0          50.9                9.2 +/-    1.08      11.4 +/-    1.08  0.120 / 0.080
G24     74.1           30.4                7.0 +/-    0.98      12.1 +/-    0.98  0.090 / 0.080
G27     272.0          37.4                7.3 +/-    2.58      11.1 +/-    2.58  0.140 / 0.150
G32     224.4          52.6                9.1 +/-    2.23      11.2 +/-    2.23  0.120 / 0.160