PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2018/05/17-00:12:30 G02 359.0 75.6 10.3 +/- 0.44 10.6 +/- 0.44 0.020 / 0.030 G05 161.2 38.2 15.2 +/- 1.47 22.8 +/- 1.47 0.030 / 0.030 G06 42.9 36.1 9.1 +/- 1.19 14.1 +/- 1.19 0.050 / 0.060 G12 302.6 75.4 11.5 +/- 0.47 11.9 +/- 0.47 0.050 / 0.050 G17 88.1 11.8 12.2 +/- 1.19 32.7 +/- 1.19 0.160 / 0.420 G19 77.8 26.2 9.9 +/- 2.23 18.9 +/- 2.23 0.300 / 0.480 G24 225.3 20.0 17.2 +/- 4.04 37.8 +/- 4.04 0.090 / 0.130 G25 316.6 31.7 11.6 +/- 1.65 19.6 +/- 1.65 0.080 / 0.100