PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2019/04/24-18:12:50 G01 125.8 11.9 8.9 +/- 27.33 23.7 +/- 27.33 0.030 / 0.040 G07 70.3 65.6 12.2 +/- 0.35 13.3 +/- 0.35 0.030 / 0.030 G08 49.6 38.3 10.7 +/- 1.25 16.0 +/- 1.25 0.080 / 0.100 G09 178.8 36.6 13.1 +/- 0.81 20.2 +/- 0.81 0.120 / 0.090 G11 115.9 36.5 13.2 +/- 1.64 20.4 +/- 1.64 0.030 / 0.030 G13 320.6 13.1 10.0 +/- 2.92 26.0 +/- 2.92 0.030 / 0.040 G17 199.4 16.0 13.5 +/- 1.21 32.8 +/- 1.21 0.250 / 0.270 G18 100.8 17.0 12.0 +/- 1.85 28.5 +/- 1.85 0.280 / 0.440 G28 272.4 49.8 13.5 +/- 2.93 17.0 +/- 2.93 0.110 / 0.270 G30 336.3 62.8 11.6 +/- 0.72 12.8 +/- 0.72 0.130 / 0.280