PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2019/03/04-05:12:30 G02 33.5 54.8 5.0 +/- 0.49 5.9 +/- 0.49 0.020 / 0.040 G05 138.5 61.9 6.0 +/- 0.77 6.7 +/- 0.77 0.030 / 0.030 G06 51.5 21.2 13.2 +/- 0.83 28.3 +/- 0.83 0.040 / 0.060 G12 205.6 70.3 5.2 +/- 1.06 5.5 +/- 1.06 0.040 / 0.060 G19 99.2 10.3 3.5 +/- 2.89 9.8 +/- 2.89 0.030 / 0.040 G25 295.1 55.2 4.4 +/- 1.46 5.2 +/- 1.46 0.040 / 0.030 G29 309.3 31.9 2.3 +/- 1.36 3.8 +/- 1.36 0.060 / 0.100