PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2018/12/09-08:57:40 G02 225.5 68.0 5.0 +/- 0.80 5.3 +/- 0.80 0.040 / 0.060 G06 44.9 68.1 3.6 +/- 0.44 3.9 +/- 0.44 0.040 / 0.050 G12 320.5 43.5 5.1 +/- 1.46 7.0 +/- 1.46 0.050 / 0.050 G17 65.6 24.8 4.2 +/- 1.04 8.2 +/- 1.04 0.050 / 0.060 G19 46.3 45.6 3.5 +/- 0.60 4.7 +/- 0.60 0.070 / 0.080 G24 248.3 38.9 7.0 +/- 1.16 10.4 +/- 1.16 0.070 / 0.090 G25 315.0 11.0 -11.1 +/- 27.92 -30.4 +/- 27.92 0.060 / 0.120