PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-16:57:40
G08     298.9          22.0                7.1 +/-    1.36      14.9 +/-    1.36  0.070 / 0.090
G10     355.4          62.6                6.4 +/-    0.74       7.2 +/-    0.74  0.110 / 0.110
G14     226.1          41.8               10.8 +/-    2.13      15.2 +/-    2.13  0.070 / 0.100
G18     59.4           52.1                8.1 +/-    1.16       9.9 +/-    1.16  0.050 / 0.070
G21     142.9          40.4               10.2 +/-    0.80      14.7 +/-    0.80  0.030 / 0.030
G24     61.7           28.2                7.4 +/-    2.30      13.5 +/-    2.30  0.040 / 0.020
G27     258.3          33.8                9.8 +/-    1.33      15.9 +/-    1.33  0.100 / 0.130
G32     237.6          63.2               10.3 +/-    1.43      11.4 +/-    1.43  0.090 / 0.130