Accession Number:

ADA242998

Title:

Mobile Atmospheric Pollutant Mapping System (MAPMS)

Descriptive Note:

Final rept. 1 Aug 1984-30 Apr 1988

Corporate Author:

CALIFORNIA INST OF TECH PASADENA

Personal Author(s):

Report Date:

1989-12-01

Pagination or Media Count:

96.0

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.

Subject Categories:

  • Environmental Health and Safety

Distribution Statement:

APPROVED FOR PUBLIC RELEASE