Differential Absorption Lidar: Effects of Speckle Noise,
Abstract
There is today a need for methods for remote monitoring in real time of air pollutants. Among the methods studied for this purpose during the last years, the differential absorption lidar (DIAL) technique has been found to be the most promising one. In the DIAL technique one uses a laser radar with a frequency which can be tuned in the neighborhood of an absorption line of a gas in the atmosphere. One measures the intensity of light backscattered from atmospheric aerosol particles, a topographical target, or a retroreflector. From the ratio of backscattered intensity at two wavelengths, one on and one off the particular absorption line, the gas content in the air column between the laser radar and the scattering volume can be obtained.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1979
- Accession Number
- ADA142801
Entities
People
- K. Oestberg