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Proceedings Paper

Millimeter-wave imaging of thermal and chemical signatures
Author(s): Nachappa Gopalsami; Apostolos C. Raptis
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Paper Abstract

Development of a passive millimeter-wave (mm-wave) system is described for remotely mapping thermal and chemical signatures of process effluents with application to arms control and nonproliferation. Because a large amount of heat is usually dissipated in the air or waterway as a by-product of most weapons of mass destruction facilities, remote thermal mapping may be used to detect concealed or open facilities of weapons of mass destruction. We have developed a focal-plane mm-wave imaging system to investigate the potential of thermal mapping. Results of mm-wave images obtained with a 160-GHz radiometer system are presented for different target scenes simulated in the laboratory. Chemical and nuclear facilities may be identified by remotely measuring molecular signatures of airborne molecules emitted from these facilities. We have developed a filterbank radiometer to investigate the potential of passive spectral measurements. Proof of principle is presented by measuring the HDO spectral line at 80.6 GHz with a 4-channel 77 - 83 GHz radiometer.

Paper Details

Date Published: 14 July 1999
PDF: 9 pages
Proc. SPIE 3703, Passive Millimeter-Wave Imaging Technology III, (14 July 1999); doi: 10.1117/12.352998
Show Author Affiliations
Nachappa Gopalsami, Argonne National Lab. (United States)
Apostolos C. Raptis, Argonne National Lab. (United States)

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

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