A Comparative Study of Laser Methods of Air Pollution Mapping,
Abstract
A comparative study has been made of three laser methods of remotely mapping gaseous pollutants of the atmosphere. It has been found that, in the case of NO2 and SO2, Differential Absorption and Scattering has superior performance potential with regard to range and sensitivity than either Laser-Induced Fluorescence or Raman Backscattering. However, because of the sophistication of this system and the difficulty of interpretation, it is strongly recommended that from the long term point of view the fluorescence approach be pursued further as it has a range and sensitivity far superior to Raman backscattering for a given laser power. An analysis of the fluorescence return expected from a local source of NO2 indicates that a plume of about 10 ppm could be detected at a range of several kilometers. However, due to absorption effects, care must be used in the interpretation of signals emanating from local concentrations in excess of about 10 ppm. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1971
- Accession Number
- AD0746280
Entities
People
- R. M. Measures
Organizations
- University of Toronto