Abstract

A sensor constellation capable of determining the location and detailed concentration distribution of chemical warfare agent simulant clouds has been developed and demonstrated on government test ranges. The constellation is based on the use of standoff passive multispectral infrared imaging sensors to make column density measurements through the chemical cloud from two or more locations around its periphery. A computed tomography inversion method is employed to produce a 3D concentration profile of the cloud from the 2D line density measurements. We discuss the theoretical basis of the approach and present results of recent field experiments where controlled releases of chemical warfare agent simulants were simultaneously viewed by three chemical imaging sensors. Systematic investigations of the algorithm using synthetic data indicate that for complex functions, 3D reconstruction errors are less than 20% even in the case of a limited three-sensor measurement network. Field data results demonstrate the capability of the constellation to determine 3D concentration profiles that account for ~〈86%〉 of the total known mass of material released.

© 2009 Optical Society of America

» View Full Text: Acrobat PDF (2584 KB)

History
Original Manuscript: August 18, 2008
Manuscript Accepted: February 25, 2009
Revised Manuscript: January 30, 2009
Published: March 24, 2009

References

Please [login to View References]

Author Affiliations

Bogdan R. Cosofret, Daisei Konno, Aram Faghfouri, Harry S. Kindle, Christopher M. Gittins, Michael L. Finson, Tracy E. Janov, William J. Marinelli

Physical Sciences Inc.

Rex K. Miyashiro

Research Support Instruments

Mark J. Levreault

Vtech Engineering Corporation

Cited By

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

Advanced Search

Recent ToC Categories (Beta)