PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2017/11/25-15:12:50 G02 82.8 13.3 8.1 +/- 3.41 20.9 +/- 3.41 0.050 / 0.060 G05 44.6 35.5 6.9 +/- 0.91 10.9 +/- 0.91 0.090 / 0.050 G13 103.0 32.6 9.3 +/- 1.21 15.4 +/- 1.21 0.110 / 0.110 G15 145.0 36.6 11.3 +/- 1.41 17.4 +/- 1.41 0.070 / 0.080 G18 230.1 27.0 8.7 +/- 2.02 16.3 +/- 2.02 0.040 / 0.030 G20 300.6 84.9 7.5 +/- 0.62 7.6 +/- 0.62 0.040 / 0.030 G21 297.4 38.1 6.7 +/- 1.51 10.0 +/- 1.51 0.120 / 0.220 G25 209.7 27.2 10.1 +/- 1.68 18.8 +/- 1.68 0.320 / 0.260 G26 310.1 15.9 5.7 +/- 1.20 13.9 +/- 1.20 0.090 / 0.140 G29 64.8 85.4 9.3 +/- 0.24 9.3 +/- 0.24 0.100 / 0.130