Laboratory Measurements of Soil Electric Properties between 0.1 and 5 GHz

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 betw...

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Bibliographic Details
Main Authors: Delaney,Allan J, Arcone,Steven A
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
Format: Text
Language:English
Published: 1982
Subjects:
Soil Mechanics
Electricity and Magnetism
*Soils
Alaska
Permafrost
Silt
Sand
Dielectric properties
Measurement
Electromagnetic wave reflections
Very high frequency
Ultrahigh frequency
Superhigh frequency
Time domain
Temperature
Moisture content
Dielectric permittivity
Time domain reflectometry
PE61102A
AST24
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA115126
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA115126
Description
Summary: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)

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