PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2017/12/16-05:13:30 G01 96.2 30.1 7.7 +/- 0.87 13.4 +/- 0.87 0.030 / 0.050 G07 120.2 49.6 8.1 +/- 0.64 10.2 +/- 0.64 0.030 / 0.060 G08 42.0 11.7 2.3 +/- 2.52 6.3 +/- 2.52 0.030 / 0.050 G11 76.1 41.4 7.3 +/- 0.52 10.3 +/- 0.52 0.040 / 0.050 G13 301.5 33.0 5.8 +/- 1.23 9.6 +/- 1.23 0.050 / 0.100 G17 210.9 49.2 10.3 +/- 1.05 13.2 +/- 1.05 0.060 / 0.120 G19 212.3 23.3 8.0 +/- 1.54 16.2 +/- 1.54 0.030 / 0.050 G28 340.1 61.8 5.1 +/- 0.43 5.8 +/- 0.43 0.040 / 0.060 G30 86.2 77.5 8.0 +/- 0.74 8.2 +/- 0.74 0.040 / 0.070