PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2018/07/21-23:27:40 G05 47.2 21.2 6.4 +/- 0.81 13.7 +/- 0.81 0.050 / 0.190 G13 82.6 36.3 9.0 +/- 1.34 13.9 +/- 1.34 0.060 / 0.160 G15 135.3 48.0 9.6 +/- 0.84 12.4 +/- 0.84 0.130 / 0.580 G16 317.4 11.3 4.2 +/- 8.17 11.3 +/- 8.17 0.130 / 0.490 G20 240.1 16.4 10.0 +/- 1.31 24.0 +/- 1.31 0.210 / 0.320 G21 307.5 42.8 7.8 +/- 1.17 10.8 +/- 1.17 0.150 / 0.480 G25 201.8 14.9 11.1 +/- 0.78 27.6 +/- 0.78 0.050 / 0.090 G26 291.4 21.1 9.7 +/- 1.67 20.9 +/- 1.67 0.040 / 0.090 G29 150.1 79.8 6.9 +/- 0.33 7.0 +/- 0.33 0.030 / 0.040