PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2017/08/06-18:43:00 G02 235.3 71.4 14.7 +/- 0.71 15.4 +/- 0.71 0.030 / 0.040 G05 175.1 12.7 20.4 +/- 4.71 53.6 +/- 4.71 0.030 / 0.040 G06 41.3 59.2 13.7 +/- 0.32 15.7 +/- 0.32 0.050 / 0.080 G12 321.9 52.0 13.8 +/- 1.14 16.9 +/- 1.14 0.140 / 0.080 G17 71.9 20.5 12.1 +/- 1.14 26.2 +/- 1.14 0.040 / 0.050 G19 58.1 37.5 11.9 +/- 1.09 18.1 +/- 1.09 0.030 / 0.040 G24 248.4 35.8 15.0 +/- 1.88 23.4 +/- 1.88 0.340 / 0.430 G25 316.8 16.1 11.5 +/- 2.02 27.8 +/- 2.02 0.150 / 0.220