PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2018/09/14-08:58:10 G07 20.5 68.5 5.2 +/- 0.94 5.5 +/- 0.94 0.040 / 0.040 G08 60.2 46.0 4.6 +/- 0.68 6.1 +/- 0.68 0.040 / 0.050 G09 175.2 44.0 6.9 +/- 1.34 9.5 +/- 1.34 0.140 / 0.320 G11 128.0 28.6 5.3 +/- 1.97 9.6 +/- 1.97 0.270 / 0.210 G18 112.6 10.8 4.3 +/- 5.17 11.7 +/- 5.17 0.120 / 0.200 G23 160.6 19.3 4.2 +/- 1.61 9.4 +/- 1.61 0.130 / 0.150 G27 40.5 17.3 3.3 +/- 2.12 7.7 +/- 2.12 0.030 / 0.030 G28 259.4 45.4 6.3 +/- 2.75 8.5 +/- 2.75 0.030 / 0.030 G30 319.7 50.0 3.1 +/- 0.86 3.9 +/- 0.86 0.210 / 0.400