CATSI EDM – A New Sensor for the Real-Time Passive Stand-off Detection and Identification of Chemicals


  1. Thériault, J-M.
  2. Lacasse, P.
  3. Lavoie, H.
  4. Bouffard, F.
  5. Montembeault, Y.
  6. Farley, V.
  7. Belhumeur, L.
  8. Lagueux, P.
Corporate Authors
Defence R&D Canada - Valcartier, Valcartier QUE (CAN);AEREX Avionics Inc, Breakeyville QUE (CAN);Telops Inc, Quebec Que (CAN)
DRDC Valcartier recently completed the development of the CATSI EDM (Compact ATmospheric Sounding Interferometer Engineering Development Model) for the Canadian Forces (CF). It is a militarized sensor designed to meet the needs of the CF in the development of area surveillance capabilities for the detection and identification of Chemical Warfare Agents (CWA) and toxic industrial chemicals (TIC). CATSI EDM is a passive infrared double-beam Fourier spectrometer system designed for real-time stand-off detection and identification of chemical vapours at distances up to 5 km. It is based on the successful passive differential detection technology. This technique known as optical subtraction, results in a target gas spectrum which is almost free of background, thus making possible detection of weak infrared emission in strong background emission. This paper summarizes the system requirements, achievements, hardware and software characteristics and test results.
Report Number
DRDC-VALCARTIER-SL-2010-175 — Scientific Literature
Date of publication
01 Jul 2010
Number of Pages
Electronic Document(PDF)

Permanent link

Document 1 of 1

Date modified: