Accession Number : ADA115126

Title :   Laboratory Measurements of Soil Electric Properties between 0.1 and 5 GHz,

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH

Personal Author(s) : Delaney,Allan J ; Arcone,Steven A

PDF Url : ADA115126

Report Date : Apr 1982

Pagination or Media Count : 12

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)

Descriptors :   *Soils, Alaska, Permafrost, Silt, Sand, Dielectric properties, Measurement, Electromagnetic wave reflections, Very high frequency, Ultrahigh frequency, Superhigh frequency, Time domain, Temperature, Moisture content

Subject Categories : Soil Mechanics
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE