A Comparison of Measured 3.8 Micron Scattering from Naturally Occurring Aerosols with that Predicted by Measured Particle Size Statistics.
Abstract
Recent field measurements of scattered 3.8 micron laser radiation from naturally occurring aerosols were made during a four-week period in coastal Southern California. Simultaneously, aerosol distribution measurements were made which, in conjunction with Mie scattering theory, gave estimates of the volume scattering coefficient at the various angles. A comparison shows that: (1) Calculated volume scattering coefficients generally decrease more rapidly in angle than measurements indicate; and (2) On the average, the calculation gives factor of 2 larger volume backscattering coefficients than measured, but underpredicts forward scattering by 33%. A second--unrelated--observation of interest: Volume scattering coefficients in the visible showed 65% correlation with 3.8 micron backscatter (177 deg) coefficients. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1977
- Accession Number
- ADA038032
Entities
People
- P. M. Livingston
Organizations
- United States Naval Research Laboratory