Evaluation of biological aerosol stand-off detection at a field trial

Per Jonsson; Magnus Elmqvist; Ove Gustafsson; Fredrik Kullander; Rolf Persson; Göran Olofsson; Torbjörn Tjärnhage; Øystein Farsund; Trym Vegard Haavardsholm; Gunnar Rustad

doi:10.1117/12.830401

17 September 2009 Evaluation of biological aerosol stand-off detection at a field trial

Per Jonsson, Magnus Elmqvist, Ove Gustafsson, Fredrik Kullander, Rolf Persson, Göran Olofsson, Torbjörn Tjärnhage, Øystein Farsund, Trym Vegard Haavardsholm, Gunnar Rustad

Author Affiliations +

Proceedings Volume 7484, Optically Based Biological and Chemical Detection for Defence V; 74840I (2009) https://doi.org/10.1117/12.830401
Event: SPIE Security + Defence, 2009, Berlin, Germany

Abstract

We have performed a field trial to evaluate technologies for stand-off detection of biological aerosols, both in daytime and at night. Several lidar (light detection and ranging) systems were tested in parallel. We present the results from three different lidar systems; one system for detection and localization of aerosol clouds using elastic backscattering at 1.57 μm, and two systems for detection and classification of aerosol using spectral detection of ultraviolet laser-induced fluorescence (UV LIF) excited at 355 nm. The UV lidar systems were utilizing different technologies for the spectral detection, a photomultiplier tube (PMT) array and an intensified charge-coupled device (ICCD), respectively. During the first week of the field trial, the lidar systems were measuring towards a semi-closed chamber at a distance of 230 m. The chamber was built from two docked standard 20-feet containers with air curtains in the short sides to contain the aerosol inside the chamber. Aerosol was generated inside the semi-closed chamber and monitored by reference equipments, e.g. slit sampler and particle counters. Signatures from several biological warfare agent simulants and interferents were measured at different aerosol concentrations. During the second week the aerosol was released in the air and the reference equipments were located in the centre of the test site. The lidar systems were measuring towards the test site centre at distances of either 230 m or approximately 1 km. In this paper we are presenting results and some preliminary signal processing for discrimination between different types of simulants and interference aerosols.

Citation Download Citation

Per Jonsson, Magnus Elmqvist, Ove Gustafsson, Fredrik Kullander, Rolf Persson, Göran Olofsson, Torbjörn Tjärnhage, Øystein Farsund, Trym Vegard Haavardsholm, and Gunnar Rustad "Evaluation of biological aerosol stand-off detection at a field trial", Proc. SPIE 7484, Optically Based Biological and Chemical Detection for Defence V, 74840I (17 September 2009); https://doi.org/10.1117/12.830401

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available