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Proceedings Paper

Temporal behavior of natural terrain radiance at infrared wavelengths
Author(s): Max P. Bleiweiss; Christopher D. Padilla
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Paper Abstract

Because most infrared (IR) observations of natural terrain are made at infrequent or widely spaced time intervals, information on the high time resolution variation in background radiance is lacking. This is in spite of the fact that meteorological and other influences can cause apparent radiance to change by amounts equivalent to a few degrees Kelvin in seconds or tens of seconds. Infrared imagery acquired during the recent Smart Weapons Operability Enhancement Joint Test and Evaluation (SWOE JT&E) allows the investigation of the nature of IR radiance fluctuations with high time resolution under a variety of diurnal and meteorological conditions. Specifically, during the Grayling I deployment, images were acquired at the rate of 6.25 frames per second, for 10 seconds, every 5 minutes during each of the 2-hr mission periods. There were 107 mission periods during the 41 days of the test. A portion of these images have been segmented according to homogeneous features (homogeneity determined independently) and histograms of apparent temperature within those features (8 in number) have been processed to arrive at several first order statistics (mean, variance, etc.) as a function of time. The nature of the fluctuations as a function of meteorological, atmospheric, and diurnal conditions is discussed.

Paper Details

Date Published: 17 June 1996
PDF: 9 pages
Proc. SPIE 2742, Targets and Backgrounds: Characterization and Representation II, (17 June 1996); doi: 10.1117/12.243011
Show Author Affiliations
Max P. Bleiweiss, Army Research Lab. (United States)
Christopher D. Padilla, Army Research Lab. (United States)

Published in SPIE Proceedings Vol. 2742:
Targets and Backgrounds: Characterization and Representation II
Wendell R. Watkins; Dieter Clement, Editor(s)

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