PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2019/08/28-18:13:10 G02 56.6 35.9 8.3 +/- 0.34 13.0 +/- 0.34 0.100 / 0.360 G05 61.1 63.4 8.9 +/- 0.54 9.8 +/- 0.54 0.120 / 0.390 G12 184.3 34.5 10.8 +/- 2.76 17.3 +/- 2.76 0.080 / 0.120 G13 127.8 14.0 12.1 +/- 2.27 30.7 +/- 2.27 0.060 / 0.090 G15 165.1 11.1 4.9 +/- 31.63 13.2 +/- 31.63 0.050 / 0.070 G21 270.2 15.6 9.6 +/- 1.43 23.5 +/- 1.43 0.050 / 0.070 G25 240.3 53.1 9.6 +/- 1.32 11.7 +/- 1.32 0.040 / 0.050 G29 327.7 52.9 7.3 +/- 1.32 8.9 +/- 1.32 0.030 / 0.050