PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/21-17:43:00
G08     267.0          19.2                7.9 +/-    2.16      17.7 +/-    2.16  0.170 / 0.500
G10     58.5           58.6                8.9 +/-    0.27      10.2 +/-    0.27  0.140 / 0.420
G11     312.0          17.0                7.0 +/-    2.04      16.6 +/-    2.04  0.030 / 0.050
G14     263.3          65.8                7.8 +/-    0.75       8.5 +/-    0.75  0.030 / 0.030
G18     312.2          33.4                6.3 +/-    0.73      10.3 +/-    0.73  0.090 / 0.320
G20     93.6           37.7                8.9 +/-    0.62      13.5 +/-    0.62  0.080 / 0.200
G21     153.6          14.0                8.8 +/-    3.71      22.3 +/-    3.71  0.070 / 0.060
G27     235.7          17.8                8.9 +/-    2.11      20.6 +/-    2.11  0.070 / 0.050
G31     181.5          25.1               10.0 +/-    2.45      19.5 +/-    2.45  0.150 / 0.340
G32     327.2          75.1                9.3 +/-    0.58       9.6 +/-    0.58  0.140 / 0.240