Pre/post-strike atmospheric assessment system (PAAS)

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The Pre/Post-Strike Atmospheric Assessment System was proposed to show the importance of local meteorological conditions in the vicinity of a site suspected of storing or producing toxic agents and demonstrate a technology to measure these conditions, specifically wind fields. The ability to predict the collateral effects resulting from an attack on a facility containing hazardous materials is crucial to conducting effective military operations. Our study approach utilized a combination of field measurements with dispersion modeling to better understand which variables in terrain and weather were most important to collateral damage predictions. To develop the PAAS wind-sensing technology, we utilized a ... continued below

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16 pages

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Peglow, S. G., LLNL & Molitoris, J. D., LLNL February 3, 1997.

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Description

The Pre/Post-Strike Atmospheric Assessment System was proposed to show the importance of local meteorological conditions in the vicinity of a site suspected of storing or producing toxic agents and demonstrate a technology to measure these conditions, specifically wind fields. The ability to predict the collateral effects resulting from an attack on a facility containing hazardous materials is crucial to conducting effective military operations. Our study approach utilized a combination of field measurements with dispersion modeling to better understand which variables in terrain and weather were most important to collateral damage predictions. To develop the PAAS wind-sensing technology, we utilized a combination of emergent and available technology from micro-Doppler and highly coherent laser systems. The method used for wind sensing is to probe the atmosphere with a highly coherent laser beam. As the beam probes, light is back-scattered from particles entrained in the air to the lidar transceiver and detected by the instrument. Any motion of the aerosols with a component along the beam axis leads to a Doppler shift of the received light. Scanning in a conical fashion about the zenith results in a more accurate and two-dimensional measurement of the wind velocity. The major milestones in the benchtop system development were to verify the design by demonstrating the technique in the laboratory, then scale the design down to a size consistent with a demonstrator unit which could be built to take data in the field. The micro-Doppler heterodyne system we developed determines absolute motion by optically mixing a reference beam with the return signal and has shown motion sensitivity to better than 1 cm/s. This report describes the rationale, technical approach and laboratory testing undertaken to demonstrate the feasibility and utility of a system to provide local meteorological data and predict atmospheric particulate motion. The work described herein was funded by the Laboratory Science and Technology Office as a part of the 1996 Laboratory Directed Research and Development Program at Lawrence Livermore National Laboratory.

Physical Description

16 pages

Notes

INIS; OSTI as DE00016134

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  • Other Information: Supercedes report DE97053422

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  • Other: DE97053422
  • Report No.: UCRL-ID--126733
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/16134 | External Link
  • Office of Scientific & Technical Information Report Number: 16134
  • Archival Resource Key: ark:/67531/metadc619728

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • February 3, 1997

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • May 6, 2016, 1:51 p.m.

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Peglow, S. G., LLNL & Molitoris, J. D., LLNL. Pre/post-strike atmospheric assessment system (PAAS), report, February 3, 1997; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc619728/: accessed July 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.