PRN Azimuth(d) Elevation(d) Vertical-TEC(tecu) Slant-TEC(tecu) S4(L1/L2) 2018/05/03-18:42:50 G01 123.5 14.6 13.7 +/- 2.16 34.5 +/- 2.16 0.040 / 0.070 G07 65.0 68.9 10.6 +/- 0.45 11.3 +/- 0.45 0.040 / 0.050 G08 48.8 38.8 9.0 +/- 0.72 13.4 +/- 0.72 0.220 / 0.380 G09 178.0 31.7 12.1 +/- 2.95 20.4 +/- 2.95 0.150 / 0.310 G11 114.9 37.5 13.2 +/- 0.76 20.1 +/- 0.76 0.030 / 0.030 G13 319.9 15.0 8.1 +/- 2.21 20.0 +/- 2.21 0.030 / 0.040 G17 201.8 15.9 14.3 +/- 2.95 34.9 +/- 2.95 0.060 / 0.110 G18 100.0 18.7 11.9 +/- 1.34 27.1 +/- 1.34 0.060 / 0.130 G28 284.0 55.3 11.7 +/- 0.71 13.8 +/- 0.71 0.040 / 0.060 G30 341.0 65.2 9.8 +/- 0.39 10.7 +/- 0.39 0.040 / 0.060