NDLI: Standoff Detection Using Millimeter and Submillimeter Wave Spectroscopy

Content Provider	IEEE Xplore Digital Library
Author	Hansen, H.J.
Copyright Year	1963
Abstract	The millimeter (MM) wave and sub-MM wave (30-600 GHz) frequency band contains fundamental rotational and vibrational resonances of many molecular gases composed of carbon, nitrogen, oxygen, and sulphur. The high specificity of rotational spectra to organic molecules affords MM wave spectroscopy having potential use in remotely sensing atmospheric pollutants and the detection of airborne chemicals is important for arms control treaty verification, intelligence collection, and environmental monitoring. This paper considers the sensitivity requirements of radiofrequency receiver systems for measuring MM wave absorption/emission signatures. The significance of receiver sensitivity and material optical depth to sensing is highlighted. A background to the technology needed for sensing at MM and sub-MM wavelengths then provides the basis for a review of MM wave spectroscopy and its role on profiling the concentrations of trace polar molecules and ionized radicals in the high altitude atmosphere. The application of the MM wave spectroscopic technique in ambient conditions is then reviewed and the issues associated with developing the technique for standoff remote sensing is discussed.
Sponsorship	IEEE Publication
Starting Page	1691
Ending Page	1704
Page Count	14
File Size	737028
File Format	PDF
ISSN	00189219
Volume Number	95
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-08-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Spectroscopy Optical receivers Frequency Resonance Gases Carbon dioxide Nitrogen Atmospheric waves Pollution Organic chemicals trace detection Millimeter wave remote sensing spectroscopy
Content Type	Text
Resource Type	Article
Subject	Computer Science Electrical and Electronic Engineering

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