PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2018/04/24-23:12:40 G02 201.7 31.4 13.5 +/- 1.26 22.9 +/- 1.26 0.050 / 0.030 G06 164.2 64.8 13.0 +/- 0.57 14.2 +/- 0.57 0.040 / 0.040 G12 305.2 12.0 7.7 +/- 14.30 20.5 +/- 14.30 0.140 / 0.340 G17 26.9 55.9 10.9 +/- 0.99 12.8 +/- 0.99 0.160 / 0.330 G19 348.6 67.8 10.2 +/- 0.41 10.9 +/- 0.41 0.100 / 0.110 G24 302.4 35.8 11.4 +/- 2.23 17.8 +/- 2.23 0.090 / 0.110 G28 98.5 33.6 12.0 +/- 1.30 19.6 +/- 1.30 0.050 / 0.110