PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2018/02/10-04:27:20 G02 202.8 37.9 6.7 +/- 1.92 10.1 +/- 1.92 0.040 / 0.050 G06 164.6 68.7 6.0 +/- 1.06 6.3 +/- 1.06 0.040 / 0.050 G12 307.9 14.9 2.4 +/- 2.02 5.9 +/- 2.02 0.050 / 0.150 G17 36.1 49.3 3.1 +/- 0.46 3.9 +/- 0.46 0.060 / 0.160 G19 5.2 64.2 3.7 +/- 0.67 4.0 +/- 0.67 0.090 / 0.310 G24 297.5 38.1 5.4 +/- 0.79 8.1 +/- 0.79 0.120 / 0.330 G28 104.1 29.8 5.6 +/- 1.64 9.8 +/- 1.64 0.060 / 0.070