PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/20-01:27:50
G10     249.9290       25.1756         13.0348 +/-  1.4657   25.3669 +/-  1.4657  0.120 / 0.270
G13     55.1507        31.5806          7.7700 +/-  1.3837   13.1737 +/-  1.3837  0.080 / 0.240
G15     93.3521        58.8427          9.9838 +/-  1.0423   11.4562 +/-  1.0423  0.150 / 0.250
G16     297.6356       14.7677          6.9820 +/-  2.2095   17.4646 +/-  2.2095  0.160 / 0.320
G18     266.5147       54.0449          9.5722 +/-  2.1293   11.5217 +/-  2.1293  0.120 / 0.150
G20     43.2944        47.6598          8.3013 +/-  1.0327   10.7858 +/-  1.0327  0.070 / 0.180
G21     331.9548       59.5662          8.0906 +/-  0.5339    9.2234 +/-  0.5339  0.040 / 0.050
G26     269.8518       15.8099         11.2886 +/-  1.1897   27.5303 +/-  1.1897  0.040 / 0.050
G29     164.1827       48.9606         10.6547 +/-  0.5815   13.6126 +/-  0.5815  0.050 / 0.050