PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2018/04/09-15:27:30 G03 251.7 71.2 11.2 +/- 0.69 11.8 +/- 0.69 0.100 / 0.170 G09 298.8 12.2 9.5 +/- 3.73 25.1 +/- 3.73 0.120 / 0.230 G14 92.6 21.8 9.6 +/- 1.00 20.3 +/- 1.00 0.050 / 0.060 G16 136.5 53.4 12.7 +/- 0.76 15.4 +/- 0.76 0.050 / 0.050 G22 194.1 60.3 12.0 +/- 0.51 13.6 +/- 0.51 0.040 / 0.050 G23 316.3 46.7 11.8 +/- 0.86 15.6 +/- 0.86 0.040 / 0.040 G26 79.2 53.2 10.5 +/- 0.88 12.8 +/- 0.88 0.030 / 0.050 G31 49.2 23.7 8.5 +/- 3.59 17.2 +/- 3.59 0.030 / 0.030