PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2018/05/25-01:12:00 G02 47.0 43.3 10.1 +/- 0.81 14.0 +/- 0.81 0.040 / 0.070 G05 93.9 68.8 10.6 +/- 0.55 11.2 +/- 0.55 0.040 / 0.070 G12 187.9 49.7 13.0 +/- 0.97 16.5 +/- 0.97 0.030 / 0.040 G25 268.4 58.1 11.2 +/- 0.47 13.0 +/- 0.47 0.030 / 0.040 G29 317.4 39.3 10.0 +/- 1.82 14.6 +/- 1.82 0.060 / 0.070