| Samples | Round 1 | Round 2 | ||||||
| Velocity (mm/ns) fitted curve | λ Wavelength (mm) | Velocity (mm/ns) fitted curve | λ Wavelength (mm) | |||||
| 2 GHz/ε | 270 | 900 | 2000 | 2 GHz/ε | 270 | 900 | 2000 | |
| Soil 1 | 080/14.06 | 29.6 | 8.9 | 4.1 | 137/4.78 | 50.7 | 15.2 | 6.8 |
| Soil 2 | 108/8.06 | 40.0 | 12.0 | 5.4 | 118/6.78 | 43.7 | 13.1 | 5.9 |
| Soil 3 | 118/6.49 | 43.7 | 13.1 | 5.9 | 168/3.20 | 62.2 | 18.6 | 8.4 |