PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/20-21:57:40
G08     319.5          12.4                6.5 +/-    1.88      17.2 +/-    1.88  0.070 / 0.080
G10     306.5          54.7                6.6 +/-    1.20       7.9 +/-    1.20  0.070 / 0.080
G14     211.9          16.4               11.0 +/-    2.74      26.5 +/-    2.74  0.040 / 0.050
G15     46.0           27.9                5.7 +/-    1.21      10.5 +/-    1.21  0.030 / 0.040
G20     6.2            64.8                7.9 +/-    0.60       8.7 +/-    0.60  0.090 / 0.280
G21     112.1          70.1                8.1 +/-    0.69       8.5 +/-    0.69  0.110 / 0.260
G24     88.3           27.9                8.7 +/-    1.15      15.9 +/-    1.15  0.110 / 0.310
G27     295.0          35.7                8.7 +/-    1.52      13.7 +/-    1.52  0.110 / 0.300
G32     213.0          38.8               11.2 +/-    0.96      16.7 +/-    0.96  0.080 / 0.130