Accession Number : ADA320987

Title :   Atmospheric Turbulence Detection in Three Dimensions by Means of a Multiple Beam SODAR.

Descriptive Note : Final rept. 1 Jul 92-31 Dec 96,

Corporate Author : GEORGIA INST OF TECH ATLANTA

Personal Author(s) : Mandock, R. L. ; Echard, J. D.

PDF Url : ADA320987

Report Date : 31 DEC 1996

Pagination or Media Count : 21

Abstract : An acoustical remote sensor has been developed to image the three-dimensional structure of atmospheric turbulence in the atmospheric boundary layer. The system is designed to detect the evolution and decay of microscale turbulence structures, the motions of individual microscale eddies, and characteristics of the mean wind in the lower boundary layer. The methodology consists in illuminating roughly half a steradian of the boundary layer with a powerful acoustical interferometer antenna, recording the backscattered signal through multiple simultaneous beams, and analyzing the acquired data for turbulence intensity and Doppler wind velocity. A commercial (Remtech PA-3) sodar is available to serve as a standard against which to compare these measurements in the vertical beam.

Descriptors :   *WIND, *ACOUSTIC DETECTORS, ATMOSPHERIC TEMPERATURE, BOUNDARY LAYER, TURBULENCE, BACKSCATTERING, REMOTE DETECTORS, ACOUSTIC IMAGES, ACOUSTIC MEASUREMENT, WIND VELOCITY, ACOUSTIC SIGNALS, ANTENNA RADIATION PATTERNS, ANTENNA ARRAYS.

Subject Categories : Acoustic Detection and Detectors
      Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE