PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2018/10/09-16:28:00 G02 59.6 33.7 9.4 +/- 0.32 15.3 +/- 0.32 0.040 / 0.070 G05 58.6 63.5 11.3 +/- 0.79 12.5 +/- 0.79 0.050 / 0.060 G12 182.8 29.1 11.8 +/- 1.54 21.1 +/- 1.54 0.100 / 0.220 G13 126.2 16.5 13.7 +/- 1.79 32.9 +/- 1.79 0.100 / 0.260 G15 166.0 11.8 14.1 +/- 2.89 37.7 +/- 2.89 0.060 / 0.120 G21 273.3 18.9 8.8 +/- 1.44 19.8 +/- 1.44 0.060 / 0.110 G25 229.0 49.8 11.8 +/- 1.16 15.0 +/- 1.16 0.020 / 0.040 G29 329.6 56.1 8.8 +/- 0.95 10.4 +/- 0.95 0.030 / 0.030