PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2018/12/24-14:12:40 G10 262.6 36.0 5.7 +/- 0.93 9.0 +/- 0.93 0.040 / 0.040 G13 44.0 21.1 4.1 +/- 2.10 8.9 +/- 2.10 0.040 / 0.040 G15 65.2 52.6 4.7 +/- 0.56 5.8 +/- 0.56 0.110 / 0.060 G16 285.1 13.2 1.7 +/- 2.34 4.5 +/- 2.34 0.110 / 0.080 G20 289.9 58.4 4.7 +/- 1.27 5.4 +/- 1.27 0.180 / 0.320 G21 3.7 70.8 2.8 +/- 0.56 3.0 +/- 0.56 0.180 / 0.190 G24 120.1 12.2 9.6 +/- 2.35 25.5 +/- 2.35 0.090 / 0.200 G27 321.4 13.1 -1.1 +/- 7.88 -2.8 +/- 7.88 0.100 / 0.240 G29 166.0 34.0 7.2 +/- 0.98 11.7 +/- 0.98 0.130 / 0.320