PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2019/06/27-09:28:00 G03 227.6 66.8 5.9 +/- 0.76 6.4 +/- 0.76 0.060 / 0.050 G07 250.3 12.7 6.4 +/- 1.18 16.9 +/- 1.18 0.060 / 0.050 G09 304.3 18.9 4.4 +/- 1.90 9.9 +/- 1.90 0.050 / 0.050 G14 101.2 13.0 2.5 +/- 2.51 6.6 +/- 2.51 0.040 / 0.040 G16 123.0 59.9 7.0 +/- 0.33 7.9 +/- 0.33 0.140 / 0.290 G22 193.4 52.2 7.4 +/- 0.64 9.0 +/- 0.64 0.220 / 0.310 G23 324.2 54.0 4.9 +/- 0.50 5.9 +/- 0.50 0.120 / 0.380 G26 66.3 50.6 5.6 +/- 1.45 7.1 +/- 1.45 0.120 / 0.410 G31 54.0 16.6 2.3 +/- 1.15 5.5 +/- 1.15 0.040 / 0.040