PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2018/09/30-08:57:40 G01 112.1 22.6 6.3 +/- 1.08 13.0 +/- 1.08 0.030 / 0.040 G07 98.8 61.1 6.3 +/- 0.43 7.1 +/- 0.43 0.030 / 0.030 G08 42.2 22.8 2.7 +/- 0.89 5.6 +/- 0.89 0.100 / 0.230 G09 172.3 13.7 3.9 +/- 3.80 10.0 +/- 3.80 0.100 / 0.230 G11 94.4 42.1 6.9 +/- 0.40 9.7 +/- 0.40 0.020 / 0.040 G13 313.2 25.5 2.9 +/- 1.36 5.6 +/- 1.36 0.030 / 0.050 G17 203.1 34.3 7.7 +/- 1.03 12.3 +/- 1.03 0.060 / 0.200 G18 84.3 23.0 3.0 +/- 0.92 6.1 +/- 0.92 0.060 / 0.170 G28 305.4 59.4 4.4 +/- 0.59 5.0 +/- 0.59 0.080 / 0.200 G30 358.3 73.9 6.1 +/- 0.58 6.3 +/- 0.58 0.080 / 0.220