PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2017/10/10-20:43:00 G10 274.1 41.5 14.9 +/- 1.69 21.1 +/- 1.69 0.070 / 0.070 G13 39.9 14.5 10.8 +/- 2.40 27.2 +/- 2.40 0.070 / 0.060 G15 53.1 43.2 13.4 +/- 0.78 18.6 +/- 0.78 0.120 / 0.350 G18 317.3 66.4 12.8 +/- 0.68 13.9 +/- 0.68 0.130 / 0.300 G20 59.0 30.1 13.3 +/- 0.46 23.2 +/- 0.46 0.070 / 0.140 G21 32.1 75.7 12.8 +/- 0.48 13.2 +/- 0.48 0.080 / 0.150 G24 115.9 17.8 15.0 +/- 1.91 34.9 +/- 1.91 0.050 / 0.050 G27 314.1 25.2 12.3 +/- 1.15 23.9 +/- 1.15 0.030 / 0.040 G29 166.3 19.6 14.6 +/- 1.20 32.4 +/- 1.20 0.100 / 0.390 G32 206.4 12.5 12.5 +/- 3.32 33.0 +/- 3.32 0.090 / 0.400