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Obtaining 3D Chemical Maps by Energy Filtered Transmission Electron Microscopy Tomography
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Published on: June 9, 2018

Imaging sensor constellation for tomographic chemical cloud mapping.

Bogdan R Cosofret1, Daisei Konno, Aram Faghfouri

  • 1Physical Sciences Inc., 20 New England Business Center, Andover, Massachusetts 01810-1077, USA.

Applied Optics
|April 3, 2009
PubMed
Summary

A new sensor constellation accurately maps chemical warfare agent simulant clouds using infrared imaging and computed tomography. This system achieves over 86% mass detection, enhancing real-time threat assessment.

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Area of Science:

  • Chemical detection and imaging
  • Sensor networks
  • Infrared spectroscopy

Background:

  • Accurate detection and characterization of chemical warfare agent (CWA) simulants are crucial for defense and safety.
  • Existing methods may lack the spatial resolution or real-time capability for detailed cloud analysis.

Purpose of the Study:

  • To develop and demonstrate a sensor constellation for determining the 3D location and concentration distribution of CWA simulant clouds.
  • To validate the system's performance using field experiments and synthetic data analysis.

Main Methods:

  • Utilizing a constellation of standoff passive multispectral infrared imaging sensors.
  • Employing computed tomography (CT) inversion to reconstruct 3D concentration profiles from 2D line density measurements.
  • Conducting controlled releases of CWA simulants and simultaneous multi-sensor imaging.

Main Results:

  • The sensor constellation successfully determined 3D concentration profiles of CWA simulant clouds.
  • Field data demonstrated the system accounted for approximately 86% of the total released simulant mass.
  • Simulations indicated less than 20% 3D reconstruction error for complex cloud functions with a three-sensor network.

Conclusions:

  • The developed sensor constellation provides a robust capability for 3D chemical cloud characterization.
  • The system shows significant potential for enhancing situational awareness and response to chemical threats.