PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/27-17:12:30
G08     299.3          21.9                6.5 +/-    1.74      13.6 +/-    1.74  0.060 / 0.080
G10     354.0          62.5                6.1 +/-    0.74       6.8 +/-    0.74  0.080 / 0.080
G14     225.6          41.4                9.4 +/-    2.05      13.4 +/-    2.05  0.060 / 0.100
G18     58.5           52.5                7.6 +/-    0.64       9.3 +/-    0.64  0.060 / 0.110
G21     142.5          40.8               10.7 +/-    0.49      15.3 +/-    0.49  0.040 / 0.040
G24     62.4           28.4                8.7 +/-    0.94      15.8 +/-    0.94  0.030 / 0.040
G27     259.0          34.0                9.7 +/-    1.03      15.6 +/-    1.03  0.070 / 0.120
G32     236.6          62.5                8.5 +/-    1.61       9.5 +/-    1.61  0.080 / 0.130