PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2019/04/26-01:12:40 G02 23.0 63.2 9.7 +/- 1.68 10.8 +/- 1.68 0.020 / 0.030 G05 151.1 52.7 14.2 +/- 0.76 17.3 +/- 0.76 0.030 / 0.030 G06 47.2 26.7 8.9 +/- 1.20 16.8 +/- 1.20 0.030 / 0.060 G12 242.1 78.4 11.2 +/- 0.66 11.4 +/- 0.66 0.030 / 0.050 G19 91.0 15.7 10.1 +/- 2.13 24.6 +/- 2.13 0.090 / 0.230 G25 308.6 46.0 9.2 +/- 1.81 12.2 +/- 1.81 0.080 / 0.190 G29 301.2 23.8 10.1 +/- 1.26 20.4 +/- 1.26 0.060 / 0.080