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Proceedings Paper

Airborne three-line mid-IR DIAL for rapid chemical species plume mapping
Author(s): Christian J. Grund; Scott Shald; Steven V. Stearns
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Paper Abstract

Coherent Technologies, Inc. has recently designed and developed an airborne Differential Absorption Lidar (DIAL) sensor that can rapidly and economically locate, identify, and quantitatively map hazardous chemical releases. The lidar was built under contract from Eastman Kodak Company and is capable of filling a broad range of chemical measurement needs. Topographic returns are used to provide simultaneous column content measurement of two (possibly three) chemical species with absorption features between approximately 2.4 microns and 3.5 microns. The system incorporates platform attitude correction and is optimized for mapping surface-source chemical plumes within swaths exceeding 50 m. This system can provide ground resolution better than 1 m at flight speeds in excess of 75 m/s. The 14-month transceiver design-and-build effort is currently in the final integration phase, and flight-testing is scheduled to begin this summer. A recently developed species-specific plume model developed by Kodak, enables reconstruction of the altitude distribution of the chemical plume and estimation of the source release rate, as well as providing realistic species-specific sensor performance predictions under differing environmental conditions. The paper discusses the system architecture, performance modeling, technology trades, and current status, and demonstrates the system measurement capabilities using modeled HCl plumes.

Paper Details

Date Published: 13 September 2004
PDF: 9 pages
Proc. SPIE 5412, Laser Radar Technology and Applications IX, (13 September 2004); doi: 10.1117/12.553964
Show Author Affiliations
Christian J. Grund, Coherent Technologies, Inc. (United States)
Scott Shald, Coherent Technologies, Inc. (United States)
Steven V. Stearns, Eastman Kodak Co. (United States)

Published in SPIE Proceedings Vol. 5412:
Laser Radar Technology and Applications IX
Gary W. Kamerman; Gary W. Kamerman, Editor(s)

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