PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2018/10/15-19:28:00 G10 276.7 43.6 11.0 +/- 0.77 15.1 +/- 0.77 0.090 / 0.150 G13 38.7 11.4 10.8 +/- 5.12 29.1 +/- 5.12 0.080 / 0.140 G15 53.8 45.6 9.5 +/- 0.53 12.7 +/- 0.53 0.040 / 0.050 G20 315.1 63.4 11.7 +/- 1.10 12.9 +/- 1.10 0.040 / 0.050 G21 32.9 76.1 12.4 +/- 0.41 12.7 +/- 0.41 0.100 / 0.210 G24 109.9 19.2 13.7 +/- 1.82 30.7 +/- 1.82 0.100 / 0.190 G27 314.9 23.9 10.5 +/- 1.86 21.0 +/- 1.86 0.190 / 0.460 G29 168.4 22.6 13.6 +/- 1.27 28.1 +/- 1.27 0.180 / 0.550 G32 205.5 17.4 13.0 +/- 2.15 30.5 +/- 2.15 0.040 / 0.050