PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-02:27:50
G08     286.1          23.4               10.5 +/-    1.23      21.2 +/-    1.23  0.070 / 0.110
G10     16.5           63.3                7.4 +/-    0.84       8.2 +/-    0.84  0.080 / 0.100
G14     235.7          52.8               12.2 +/-    1.10      14.8 +/-    1.10  0.020 / 0.040
G18     68.8           49.3                7.4 +/-    0.54       9.5 +/-    0.54  0.030 / 0.030
G21     148.3          34.7               10.9 +/-    1.22      17.4 +/-    1.22  0.050 / 0.110
G24     52.8           24.3                7.9 +/-    0.64      15.7 +/-    0.64  0.050 / 0.120
G27     247.3          28.5               11.1 +/-    1.32      20.1 +/-    1.32  0.040 / 0.090
G31     183.2          10.3               -4.8 +/-   20.18     -13.3 +/-   20.18  0.040 / 0.090
G32     256.3          70.0               10.4 +/-    0.53      11.0 +/-    0.53  0.070 / 0.120