PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2018/02/09-19:58:00 G03 219.7 63.7 10.3 +/- 1.16 11.4 +/- 1.16 0.050 / 0.060 G09 306.1 21.2 9.1 +/- 2.74 19.4 +/- 2.74 0.050 / 0.060 G14 103.8 11.9 9.8 +/- 2.19 26.3 +/- 2.19 0.190 / 0.210 G16 117.6 62.6 11.4 +/- 0.41 12.7 +/- 0.41 0.230 / 0.230 G22 190.6 49.1 9.9 +/- 0.78 12.7 +/- 0.78 0.130 / 0.290 G23 324.6 54.4 8.2 +/- 0.68 9.8 +/- 0.68 0.140 / 0.280 G26 61.3 48.5 7.8 +/- 1.02 10.1 +/- 1.02 0.050 / 0.040 G31 55.2 15.3 7.6 +/- 2.90 18.7 +/- 2.90 0.040 / 0.040