PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2019/03/16-04:27:20 G02 35.2 53.3 3.4 +/- 1.21 4.1 +/- 1.21 0.030 / 0.030 G05 134.6 63.4 5.1 +/- 0.52 5.6 +/- 0.52 0.020 / 0.030 G06 52.7 19.1 3.4 +/- 2.48 7.7 +/- 2.48 0.030 / 0.030 G12 202.9 68.5 3.8 +/- 0.40 4.0 +/- 0.40 0.030 / 0.040 G25 292.6 55.9 3.5 +/- 3.67 4.1 +/- 3.67 0.050 / 0.050 G29 311.0 33.9 1.4 +/- 1.04 2.3 +/- 1.04 0.040 / 0.060