PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-17:58:10
G08     298.6          22.2                7.7 +/-    1.59      16.1 +/-    1.59  0.060 / 0.110
G10     354.9          62.5                6.4 +/-    0.88       7.1 +/-    0.88  0.050 / 0.110
G14     226.0          42.0                7.7 +/-    2.21      10.8 +/-    2.21  0.050 / 0.080
G18     58.9           52.4                7.0 +/-    0.44       8.5 +/-    0.44  0.040 / 0.110
G21     142.6          39.5               10.1 +/-    1.13      14.8 +/-    1.13  0.050 / 0.100
G24     62.0           28.3                5.2 +/-    0.37       9.5 +/-    0.37  0.040 / 0.100
G27     258.4          33.8                8.9 +/-    1.76      14.5 +/-    1.76  0.030 / 0.040
G32     237.1          62.6                8.4 +/-    0.68       9.3 +/-    0.68  0.030 / 0.030