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Proceedings Paper

Studies of millimeter-wave phenomenology for helicopter brownout mitigation
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Paper Abstract

The unique ability of the millimeter-wave portion of the spectrum to penetrate typical visual obscurants has resulted in a wide range of possible applications for imagers in this spectrum. Of particular interest to the military community are imagers that can operate effectively in Degraded Visual Environments (DVE's) experienced by helicopter pilots when landing in dry, dusty environments, otherwise known as "brownout." One of the first steps to developing operational requirements for imagers in this spectrum is to develop a quantitative understanding of the phenomenology that governs imaging in these environments. While preliminary studies have been done in this area, quantitative, calibrated measurements of typical targets and degradation of target contrasts due to brownout conditions are not available. To this end, we will present results from calibrated, empirical measurements of typical targets of interest to helicopter pilots made in a representative desert environment. In addition, real-time measurements of target contrast reduction due to brownout conditions generated by helicopter downwash will be shown. These data were acquired using a W-band, dual-polarization radiometric scanner using optical-upconversion detectors.

Paper Details

Date Published: 24 September 2009
PDF: 8 pages
Proc. SPIE 7485, Millimetre Wave and Terahertz Sensors and Technology II, 74850F (24 September 2009); doi: 10.1117/12.830480
Show Author Affiliations
Christopher A. Schuetz, Phase Sensitive Innovations, Inc. (United States)
E. Lee Stein, Univ. of Delaware (United States)
Jesse Samluk, Univ. of Delaware (United States)
Daniel Mackrides, Univ. of Delaware (United States)
John P. Wilson, Univ. of Delaware (United States)
Richard D. Martin, Phase Sensitive Innovations, Inc. (United States)
Thomas E. Dillon, Phase Sensitive Innovations, Inc. (United States)
Dennis W. Prather, Univ. of Delaware (United States)


Published in SPIE Proceedings Vol. 7485:
Millimetre Wave and Terahertz Sensors and Technology II
Keith A. Krapels; Neil A. Salmon, Editor(s)

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