Laboratory Measurements of Soil Electric Properties between 0.1 and 5 GHz,
Abstract
Dielectric measurements have been performed on silt and sand samples from permafrost areas using Time Domain Reflectometry. The sample temperatures were varied from +25 C to -25 C, and volumetric water content was varied between oven-dry and 0.55 gH2O/cc. The data were processed for frequencies between 0.1 and 5.0 GHz. The results show a constant K' and a low K' for frequencies up to 1 GHz. A frequency dependence seen on the data above 2 GHz is probably the result of unfrozen, adsorbed water. At moisture levels near saturation at all temperatures, these soils have excellent propagation characteristics for ground-probing radar operating below 0.3 GHz. Massive ice should be easily detectable in permafrost within a few degrees of 0 C. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1982
- Accession Number
- ADA115126
Entities
People
- Allan J. Delaney
- Steven A. Arcone
Organizations
- Cold Regions Research and Engineering Laboratory