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Dissemination monitoring by LWIR hyperspectral imaging
Author(s): F. Wilsenack; T. Wolf; L. Landström; P. Wästerby; T. Tjärnhage
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Paper Abstract

With the purpose of validating dispersion models, ammonia (NH3) releases were performed in September 2018 and a network consisting of NH3 detectors and temperature sensors were positioned in a grid in front of the source. In addition, the test grid was also monitored by a focal plane array imaging system based on a LWIR detector, which was positioned at a safe standoff distance of 1 km. With this setup, it was possible to monitor the release and the development of the generated cloud during the dissemination, as well as monitoring surrounding areas for risk assessment purposes during and after each challenge. As the observation was performed in near real time (approximately 0.5 Hz frame rate for the measurement, data transfer, Fourier transform and analysis), it was possible to give immediate feedback to the release team and test control personnel. Of special interest are background concentrations below the detection limit, as once these are achieved this indicates whether an area is safe and/or when additional challenges/disseminations can occur.

Paper Details

Date Published: 17 May 2019
PDF: 8 pages
Proc. SPIE 11010, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XX, 1101007 (17 May 2019); doi: 10.1117/12.2518834
Show Author Affiliations
F. Wilsenack, Wehrwissenschaftliches Institut für Schutztechnologien (Germany)
T. Wolf, Wehrwissenschaftliches Institut für Schutztechnologien (Germany)
L. Landström, FOI-Swedish Defence Research Agency (Sweden)
P. Wästerby, FOI-Swedish Defence Research Agency (Sweden)
T. Tjärnhage, FOI-Swedish Defence Research Agency (Sweden)


Published in SPIE Proceedings Vol. 11010:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XX
Jason A. Guicheteau; Chris R. Howle, Editor(s)

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