PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2018/05/09-18:13:10 G01 125.1 13.3 14.2 +/- 3.83 36.7 +/- 3.83 0.050 / 0.060 G07 59.0 69.4 12.8 +/- 0.65 13.6 +/- 0.65 0.050 / 0.060 G08 50.1 40.2 12.6 +/- 1.04 18.3 +/- 1.04 0.160 / 0.430 G09 178.1 33.7 15.5 +/- 1.28 25.2 +/- 1.28 0.160 / 0.330 G11 117.0 36.4 14.2 +/- 0.73 21.9 +/- 0.73 0.070 / 0.110 G13 320.5 13.4 11.0 +/- 2.90 28.5 +/- 2.90 0.070 / 0.110 G17 201.4 14.2 15.4 +/- 2.11 39.1 +/- 2.11 0.060 / 0.060 G18 101.9 17.8 13.5 +/- 1.27 31.3 +/- 1.27 0.050 / 0.070 G28 280.6 54.4 14.8 +/- 1.03 17.8 +/- 1.03 0.130 / 0.340 G30 337.8 63.4 12.6 +/- 0.85 13.9 +/- 0.85 0.120 / 0.420