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Proceedings Paper

Measurement of nadir and near-nadir 94-GHz brightness temperatures of several tactical-scene clutter types
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Paper Abstract

The authors present 94-GHz radiometric brightness temperatures of various clutter materials at nadir. The clutter materials measured include field vegetation, asphalt pavement, and an asphalt shingle roof and data is presented for each clutter type. We also report measurements that quantify the effect of water on the brightness temperature of metal. These measurements were made by adding calibrated quantities of water to a metal plate while recording the plate's millimeter-wave brightness temperature. Off-nadir data out to 45 deg is also presented for the field vegetation and asphalt pavement. Using a simple rough scattering model for the materials, we made estimates of the emissivity of the field vegetation and asphalt. The emissivity of the roof was determined by measuring its brightness temperature as it was heated.

Paper Details

Date Published: 14 July 1999
PDF: 12 pages
Proc. SPIE 3703, Passive Millimeter-Wave Imaging Technology III, (14 July 1999); doi: 10.1117/12.352995
Show Author Affiliations
David A. Wikner, Army Research Lab. (United States)
Thomas J. Pizzillo, Army Research Lab. (United States)


Published in SPIE Proceedings Vol. 3703:
Passive Millimeter-Wave Imaging Technology III
Roger M. Smith, Editor(s)

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