Spatial and Frequency Diversity in Lidar Systems
Abstract
The research is concerned with the signal to noise ration of LIDAR signals. LIDAR is a remote sensing technique using light to gather information on molecular concentrations, wind velocities, and temperatures in the atmosphere on a temporally and spatially resolved basis. Our interest is in the statistical optics of the detection process rather than the data that might be collected in the ambient atmosphere and our experiments, therefore, are carried out in the laboratory. The laboratory experiments are concerned the fluctuations in LIDAR measurements. LIDAR signals typically arise from the backscatter of laser radiation from aerosols, and the return signal at the detector plane is spatially distributed in a speckle pattern. The contrast ratio in the pattern is unity so that an estimate of the average intensity from the intensity measured over a single speckle-area yields a signal-to-noise ratio of unity
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 15, 1993
- Accession Number
- ADA266192
Entities
People
- John F. Ward
Organizations
- University of Michigan