Trends and future applications of optical remote sensing and computed tomography to map air contaminants

Lori A. Todd; Michael G. Yost; Ram A. Hashmonay

doi:10.1117/12.339019

10 February 1999 Trends and future applications of optical remote sensing and computed tomography to map air contaminants

Lori A. Todd, Michael G. Yost, Ram A. Hashmonay

Author Affiliations +

Proceedings Volume 3534, Environmental Monitoring and Remediation Technologies; (1999) https://doi.org/10.1117/12.339019
Event: Photonics East (ISAM, VVDC, IEMB), 1998, Boston, MA, United States

Abstract

More than twenty years have passed since the concept of combining Computed Tomography (CT) and Optical Remote Sensing (ORS) was first suggested to map air contaminants. However, there have been no commercial applications of CT-ORS due to a variety of reasons including hardware limitations and slow acceptance by the occupational and environmental scientific communities. A CT-ORS monitoring system provides the potential for near real-time mapping of multiple gases over large areas. Not just another nifty tool, this technology represents a major departure from conventional sampling methods and could allow us to understand chemical transport and exposure in ways, which are unavailable using conventional methods. Yet critical questions remain unanswered: which contaminant sources are most appropriate for this technology and how does this data apply to human exposure assessment? We discuss potential applications of CT-ORS, such a using open-path Fourier Transform Infrared spectroscopy for mapping leaks and evaluating worker exposures and quantifying emission flux from a process facility. Large scale (greater than 1 km) CT reconstructions could be obtained from a variety of ORS devices (Tunable Diode Laser, Differential Optical Absorption Spectroscopy, or Differential Absorption Lidar). Reconstructions could help locate industrial emissions and provide improved estimates of pollutant transport.

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Lori A. Todd, Michael G. Yost, and Ram A. Hashmonay "Trends and future applications of optical remote sensing and computed tomography to map air contaminants", Proc. SPIE 3534, Environmental Monitoring and Remediation Technologies, (10 February 1999); https://doi.org/10.1117/12.339019

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