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Extinction Behavior of Soil at 26.5 to 110 GHz

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1 Author(s)
Koh, G. ; U.S. Army Eng. Res. Dev. Center, Cold Regions Res. & Eng. Lab., Hanover, NH

Soil electromagnetic properties at the microwave frequencies have been extensively documented in the literature. However, similar information at the higher millimeter frequencies is not available. A laboratory experiment was conducted to investigate the extinction behavior of wet and dry soil at millimeter wavelengths (26.5-110 GHz). For dry soil, the extinction coefficient increased from 0.02 to 0.6 cm-1 as the frequency increased from 26.5 to 110 GHz. The presence of even a small amount of water in the soil (5% by weight) reduced the penetration of millimeter wave signals into soil by a factor of ten.

Published in:

Geoscience and Remote Sensing Letters, IEEE  (Volume:5 ,  Issue: 3 )