PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2018/05/09-03:12:40 G02 67.0 26.2 8.3 +/- 1.56 15.8 +/- 1.56 0.080 / 0.100 G05 49.1 51.8 7.8 +/- 0.77 9.7 +/- 0.77 0.070 / 0.130 G12 183.0 23.7 8.6 +/- 2.62 17.2 +/- 2.62 0.040 / 0.030 G13 121.5 20.9 9.3 +/- 2.22 20.1 +/- 2.22 0.030 / 0.030 G15 159.0 19.1 6.8 +/- 1.41 15.3 +/- 1.41 0.170 / 0.300 G20 221.8 27.1 10.8 +/- 3.17 20.1 +/- 3.17 0.200 / 0.190 G21 278.1 22.2 10.3 +/- 0.85 21.4 +/- 0.85 0.080 / 0.070 G25 227.1 45.5 10.0 +/- 2.52 13.3 +/- 2.52 0.080 / 0.090 G29 333.4 62.3 9.9 +/- 0.35 11.0 +/- 0.35 0.020 / 0.030