PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-16:43:10
G10     297.1          51.4               11.8 +/-    1.42      14.6 +/-    1.42  0.070 / 0.080
G14     210.4          12.2                9.4 +/-   19.72      25.0 +/-   19.72  0.060 / 0.090
G15     45.8           26.6                8.6 +/-    1.29      16.2 +/-    1.29  0.040 / 0.050
G18     3.8            65.6               10.5 +/-    1.02      11.4 +/-    1.02  0.030 / 0.040
G20     70.7           20.2                8.2 +/-    1.48      18.0 +/-    1.48  0.070 / 0.290
G21     105.6          68.8               12.7 +/-    0.37      13.5 +/-    0.37  0.070 / 0.280
G24     98.5           26.7               13.2 +/-    1.27      24.9 +/-    1.27  0.070 / 0.140
G27     298.7          35.1               11.1 +/-    0.76      17.6 +/-    0.76  0.070 / 0.110
G32     211.1          31.5               14.3 +/-    2.43      24.2 +/-    2.43  0.110 / 0.380