PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/20-23:58:00
G08     295.5          23.2               12.9 +/-    0.71      26.2 +/-    0.71  0.040 / 0.080
G10     357.4          62.7               12.2 +/-    0.38      13.6 +/-    0.38  0.040 / 0.080
G14     227.2          44.8               15.4 +/-    1.46      20.8 +/-    1.46  0.050 / 0.110
G18     58.5           53.2               12.6 +/-    0.75      15.3 +/-    0.75  0.050 / 0.080
G21     143.9          42.4               15.3 +/-    0.96      21.5 +/-    0.96  0.030 / 0.040
G24     60.8           28.0               10.5 +/-    0.64      19.2 +/-    0.64  0.030 / 0.030
G27     256.5          33.2               14.0 +/-    1.77      23.1 +/-    1.77  0.090 / 0.110
G32     238.4          61.7               14.9 +/-    0.62      16.7 +/-    0.62  0.090 / 0.100