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|Title:||Laboratory measurements of soil electric properties between 0.1 and 5 GHz|
|Authors:||Delaney, Allan J.|
Arcone, Steven A.
|Publisher:||Cold Regions Research and Engineering Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||CRREL report ; 82-10.|
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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