PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-18:27:50
G08     286.8          22.7                8.6 +/-    1.02      17.7 +/-    1.02  0.080 / 0.090
G10     20.1           63.2               10.9 +/-    0.49      12.1 +/-    0.49  0.090 / 0.150
G14     236.5          52.1               13.3 +/-    1.74      16.4 +/-    1.74  0.100 / 0.300
G18     72.9           46.3                9.4 +/-    1.08      12.4 +/-    1.08  0.100 / 0.230
G21     147.9          28.4               12.4 +/-    1.98      22.4 +/-    1.98  0.100 / 0.060
G24     51.5           23.4                7.5 +/-    3.06      15.2 +/-    3.06  0.100 / 0.090
G27     246.5          27.8               11.6 +/-    2.67      21.3 +/-    2.67  0.030 / 0.020
G31     183.5          10.6               -2.1 +/-   20.72      -5.9 +/-   20.72  0.030 / 0.020
G32     260.6          71.5               10.4 +/-    0.88      10.9 +/-    0.88  0.040 / 0.030