Accession Number : ADA184972

Title :   Development of a Data Analysis System for the Detection of Lower Level Atmospheric Turbulence with an Acoustic Sounder.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Wroblewski, Michael R

PDF Url : ADA184972

Report Date : Jun 1987

Pagination or Media Count : 100

Abstract : Atmospheric density fluctuations induce phase perturbations that degrade the spatial coherence of a laser beam propagating through the atmosphere. These degradations spread the laser beam and alter the centroid are found at virtually all levels of the atmosphere. A substantial fraction of the optical turbulence along a vertical path arises from the heat flux between the atmosphere and the Earth's surface. This type of turbulence is typically within the first 100 to 200 meters above the surface. During this thesis research, a high frequency acoustic sounder was developed to analyze this turbulent layer. The primary focus was the development of the command and control software required to coordinate the data collection and reduction. The system was used at two sites and should prove useful in quantifying the effects of optical turbulence within the surface boundary layer on laser and optical system performance. (Author)

Descriptors :   *ATMOSPHERIC SOUNDING, *COMPUTER APPLICATIONS, *TURBULENCE, LASER BEAMS, PERTURBATIONS, DEGRADATION, HEAT FLUX, OUTPUT, THESES, COMPUTER PROGRAMS, DATA ACQUISITION, DATA REDUCTION, CHARTS

Subject Categories : Atmospheric Physics
      Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE