PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/27-17:42:40
G08     285.3          22.4                8.9 +/-    1.43      18.5 +/-    1.43  0.070 / 0.100
G10     24.3           63.0                7.5 +/-    1.96       8.3 +/-    1.96  0.060 / 0.110
G14     238.6          53.4               10.8 +/-    2.16      13.0 +/-    2.16  0.230 / 0.150
G18     75.2           45.0                8.7 +/-    1.18      11.7 +/-    1.18  0.100 / 0.280
G21     148.8          27.4               13.0 +/-    1.51      24.0 +/-    1.51  0.230 / 0.430
G24     50.0           22.3                8.0 +/-    3.06      16.7 +/-    3.06  0.200 / 0.300
G27     244.8          26.7               10.5 +/-    2.12      19.8 +/-    2.12  0.030 / 0.020
G31     182.8          12.7                8.2 +/-    3.33      21.5 +/-    3.33  0.020 / 0.020
G32     267.0          73.0                8.9 +/-    0.79       9.2 +/-    0.79  0.100 / 0.090