Densitometric Analysis to Determine Artificial Cloud Expansion Characteristics.
Abstract
Microdensitometric film reduction and computer analysis and display techniques were applied to optical data on smoke and chemical tracers in the stratosphere and upper atmosphere. Photographic brightness distributions were converted to digital optical density arrays recorded on magnetic tape and subsequently reduced by statistical and Fourier methods to determine turbulence parameters and diffusion coefficients. Stratospheric wind data derived by the smoke trail method were spectrum analysed and Richardson numbers determined. A new approach to separation of turbulence data from the mean wind was used and an alternative to Fourier methods implemented for spectrum analysis.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 14, 1975
- Accession Number
- ADA013777
Entities
People
- Christian A. Trowbridge
- Irving L. Kofsky