PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2018/05/04-00:42:30 G02 313.0 81.7 11.2 +/- 0.94 11.3 +/- 0.94 0.040 / 0.050 G05 165.9 28.0 17.1 +/- 0.67 31.3 +/- 0.67 0.020 / 0.050 G06 40.4 46.1 9.6 +/- 0.58 12.7 +/- 0.58 0.060 / 0.110 G12 318.4 64.6 10.9 +/- 0.63 11.9 +/- 0.63 0.050 / 0.110 G17 79.2 18.5 11.4 +/- 0.75 26.0 +/- 0.75 0.140 / 0.150 G19 68.2 32.3 12.2 +/- 1.13 20.5 +/- 1.13 0.090 / 0.170 G24 233.7 27.2 15.3 +/- 1.31 28.5 +/- 1.31 0.030 / 0.040 G25 317.8 22.1 9.2 +/- 2.22 19.3 +/- 2.22 0.030 / 0.040