PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2019/04/26-02:43:10 G02 58.3 33.1 7.4 +/- 2.14 12.1 +/- 2.14 0.060 / 0.070 G05 59.9 61.6 10.7 +/- 0.58 12.0 +/- 0.58 0.080 / 0.080 G12 186.8 37.2 11.1 +/- 1.32 17.0 +/- 1.32 0.210 / 0.390 G13 128.8 13.6 9.4 +/- 1.86 24.3 +/- 1.86 0.290 / 0.380 G15 163.9 11.4 1.8 +/- 19.77 5.0 +/- 19.77 0.030 / 0.030 G21 270.5 17.2 11.0 +/- 2.17 25.8 +/- 2.17 0.030 / 0.030 G25 238.5 53.4 11.0 +/- 4.58 13.3 +/- 4.58 0.150 / 0.360 G29 331.0 56.4 11.8 +/- 0.55 13.8 +/- 0.55 0.200 / 0.310