PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2019/09/27-03:13:00 G03 233.3 66.9 3.7 +/- 0.91 3.9 +/- 0.91 0.060 / 0.060 G07 250.1 10.8 -0.1 +/- 17.66 -0.3 +/- 17.66 0.060 / 0.060 G09 305.4 21.7 3.2 +/- 2.56 6.7 +/- 2.56 0.070 / 0.330 G14 100.8 14.8 3.8 +/- 2.16 9.5 +/- 2.16 0.090 / 0.400 G16 116.7 60.3 5.2 +/- 0.60 5.9 +/- 0.60 0.090 / 0.270 G22 196.3 53.1 6.5 +/- 1.30 7.9 +/- 1.30 0.120 / 0.370 G23 323.0 52.9 5.6 +/- 0.80 6.9 +/- 0.80 0.050 / 0.060 G26 64.4 49.4 3.7 +/- 0.56 4.7 +/- 0.56 0.050 / 0.050 G31 54.4 15.8 2.2 +/- 2.90 5.3 +/- 2.90 0.040 / 0.070