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Title: Laboratory measurements of soil electric properties between 0.1 and 5 GHz
Authors: Delaney, Allan J.
Arcone, Steven A.
Keywords: Dielectric properties
Dielectric measurements
Frozen ground
Soil properties
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: CRREL report ; 82-10.
Description: CRREL Report
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 g H2O/cm^3. 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 O°C.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:CRREL Report

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