PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2017/09/29-06:12:40 G03 199.2 36.9 7.5 +/- 0.57 11.5 +/- 0.57 0.020 / 0.020 G07 277.0 30.4 5.6 +/- 1.43 9.7 +/- 1.43 0.030 / 0.030 G08 149.4 16.8 8.0 +/- 1.64 19.0 +/- 1.64 0.150 / 0.180 G09 320.1 50.1 5.5 +/- 0.73 7.0 +/- 0.73 0.110 / 0.160 G16 53.3 56.5 7.3 +/- 0.66 8.6 +/- 0.66 0.090 / 0.100 G22 182.0 20.3 6.7 +/- 2.41 14.6 +/- 2.41 0.070 / 0.100 G23 1.0 78.6 5.2 +/- 0.42 5.2 +/- 0.42 0.030 / 0.040 G26 44.0 28.1 3.8 +/- 2.20 6.9 +/- 2.20 0.030 / 0.030 G27 114.0 26.0 5.6 +/- 1.32 10.7 +/- 1.32 0.120 / 0.220