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Proceedings Paper

Applications Of Millimeter Wave Imaging
Author(s): James P. Hollinger
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Paper Abstract

Millimeter waves have the advantage of greater resolution over longer wavelength microwaves, for a given antenna size, while still penetrating clouds and fog to provide near all-weather operation compared to high resolution infrared and optical sensors which are blinded except in clear weather. Millimeter-wave imaging, from aircraft and spacecraft, has been used to provide information on soil moisture, type and porosity; to locate field and vegetation boundaries and snow cover; to define intense fire areas through smoke; to infer the thickness and water content of clouds; to map the location and distribution of weather fronts, convection zones, severe storms, and precipitation; to detect and quantify marine oil spills; to map ocean thermal fronts and measure marine wind speed; to delineate the ice-ocean edge; to locate icebergs, polynas, and leads; to enable optimum transport through the ice pack; to identify and map sea ice type, age, and concentration; and to detect ships, aircraft, and man-made features through adverse weather for various surveillance and targeting applications. The emission, absorption, and transmission of atmospheric constituents and their effects on the choice of observational frequency, along with the general radiative properties of terrain and ocean surfaces, are briefly discussed. Major emphasis is placed on the application of millimeter-wave imaging to the all-weather location and measurement of sea ice properties.

Paper Details

Date Published: 24 October 1985
PDF: 7 pages
Proc. SPIE 0544, Millimeter Wave Technology III, (24 October 1985); doi: 10.1117/12.948264
Show Author Affiliations
James P. Hollinger, U.S. Naval Research Laboratory (United States)

Published in SPIE Proceedings Vol. 0544:
Millimeter Wave Technology III
James C. Wiltse, Editor(s)

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