PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/20-03:27:30
G01     319.8          15.0                6.6 +/-    1.33      16.5 +/-    1.33  0.210 / 0.300
G08     259.0          15.0                9.8 +/-    1.90      24.3 +/-    1.90  0.200 / 0.350
G10     72.5           56.1                6.5 +/-    0.78       7.6 +/-    0.78  0.020 / 0.020
G11     304.7          23.1                8.9 +/-    0.85      18.2 +/-    0.85  0.020 / 0.020
G14     289.9          70.7                7.1 +/-    0.55       7.5 +/-    0.55  0.240 / 0.340
G18     97.9           32.7                6.1 +/-    1.08      10.1 +/-    1.08  0.240 / 0.260
G27     225.3          10.7                9.8 +/-   12.95      26.9 +/-   12.95  0.050 / 0.050
G31     177.6          37.2                9.2 +/-    1.78      14.0 +/-    1.78  0.040 / 0.040
G32     354.2          70.7                6.3 +/-    0.58       6.6 +/-    0.58  0.050 / 0.070