Mobile Atmospheric Pollutant Mapping System (MAPMS)

Abstract

The Mobile Atmospheric Pollutant Mapping (MAPM) System is a dual CO2 laser, differential absorption lidar (DIAL) system designed and developed for the remote, range-resolved measurement of concentrations of trace molecular species and aerosols optical depths. In the DIAL technique, atmospheric aerosols provide the backscatter for a pulsed laser beam; one laser is tuned to an absorbing wavelength of the molecular species of interest; the other is tuned to a nearby non-absorbing wavelength. The derivative of the logarithm of the ratio of the two signals is used to determine the gas concentration. Heterodyne detection is employed with MAPM to enable long-range measurements. MAPM has been demonstrated with ambient water vapor, ozone, and aerosols, with a free release of ethylene, and with various organic solvent vapors in a sample chamber.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1989
Accession Number
ADA242998

Entities

People

  • William B. Grant

Organizations

  • California Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Absorption Coefficients
  • Accuracy
  • Air Force
  • Alkenes
  • Carbon Dioxide Lasers
  • Coefficients
  • Detection
  • Detectors
  • Engineering
  • Jet Propulsion
  • Laser Beams
  • Laser Science
  • Lasers
  • Local Oscillators
  • Measurement
  • Scattering

Fields of Study

  • Environmental science
  • Physics

Readers

  • Atmospheric Remote Sensing.
  • Optical Physics and Photonics.
  • Spectroscopy.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers