PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/26-17:43:10
G08     286.7          22.6                8.2 +/-    0.80      17.0 +/-    0.80  0.090 / 0.110
G10     21.2           63.1               10.9 +/-    0.89      12.1 +/-    0.89  0.090 / 0.120
G14     237.0          52.3               12.5 +/-    1.89      15.3 +/-    1.89  0.160 / 0.250
G18     73.6           45.9                9.8 +/-    0.86      13.0 +/-    0.86  0.110 / 0.220
G21     148.3          28.7               11.6 +/-    2.08      20.9 +/-    2.08  0.080 / 0.250
G24     51.1           23.1                7.6 +/-    3.19      15.4 +/-    3.19  0.110 / 0.150
G27     246.1          27.6               10.6 +/-    2.67      19.5 +/-    2.67  0.070 / 0.090
G31     183.1          11.4                0.0 +/-   19.28       0.0 +/-   19.28  0.070 / 0.090
G32     262.5          72.1               10.3 +/-    0.97      10.8 +/-    0.97  0.030 / 0.020