PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-00:57:50
G10     298.8          51.8                9.8 +/-    0.72      12.0 +/-    0.72  0.070 / 0.130
G14     210.5          15.0               14.7 +/-    3.73      36.6 +/-    3.73  0.080 / 0.130
G15     46.1           28.3                8.6 +/-    0.88      15.6 +/-    0.88  0.030 / 0.040
G18     359.6          65.9                9.4 +/-    0.48      10.2 +/-    0.48  0.030 / 0.040
G20     73.0           16.0                8.8 +/-    1.83      21.4 +/-    1.83  0.040 / 0.040
G21     101.9          72.7               12.4 +/-    0.59      13.0 +/-    0.59  0.050 / 0.070
G24     97.3           27.1               13.1 +/-    0.81      24.3 +/-    0.81  0.150 / 0.680
G27     296.8          35.8               10.5 +/-    1.42      16.4 +/-    1.42  0.140 / 0.460
G32     211.9          32.2               13.3 +/-    0.67      22.2 +/-    0.67  0.090 / 0.090