PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2018/03/23-20:12:30 G07 337.3 59.5 13.1 +/- 0.36 15.0 +/- 0.36 0.120 / 0.110 G08 99.7 53.7 15.1 +/- 0.52 18.2 +/- 0.52 0.080 / 0.120 G09 189.9 70.8 15.7 +/- 0.71 16.5 +/- 0.71 0.060 / 0.080 G11 145.7 14.5 24.6 +/- 2.30 61.8 +/- 2.30 0.070 / 0.090 G23 155.6 35.2 17.5 +/- 1.71 27.7 +/- 1.71 0.030 / 0.030 G27 51.5 29.3 13.3 +/- 1.51 23.6 +/- 1.51 0.030 / 0.030 G28 240.4 32.7 15.6 +/- 1.75 25.9 +/- 1.75 0.100 / 0.180 G30 306.5 39.7 12.5 +/- 1.06 18.2 +/- 1.06 0.060 / 0.120