Acoustic profiler for wind, temperature, and turbulence

Details Acoustic profiler for wind, temperature, and turbulence Acoustic profiler for wind, temperature, and turbulence

2008-03-18

2008-03-18

Allen, Andre J. (Department: 2855)

Measuring and testing

Fluid flow direction

C073S170170

Reexamination Certificate

active

11381506

ABSTRACT:
Characterizing atmospheric conditions is accomplished by measuring at least one varying spectral characteristic of sound at a plurality of intervals from a sound source with the point of measurement and the sound source in relative motion and separated by altitude. The spectral characteristic of the sound at each interval is attributed to a path traveled by the sound and a plurality of simultaneous equations is created for the plurality of paths using a second plurality of altitude segments for each path, each segment having a particular vector as a variable on the spectral characteristic, the initial coefficients in each vector assumed based on predetermined atmospheric models for each altitude segment. The resulting calculated vector and the predetermined atmospheric model are iterated for a minimized cost function in a variational analysis to determine the vector for each altitude segment, the vector providing atmospheric properties for the associated altitude segment.

REFERENCES:
patent: 6480142 (2002-11-01), Rubin
patent: 6700834 (2004-03-01), Brumley et al.
patent: 2002/0018400 (2002-02-01), Brumley et al.
patent: 2004/0184350 (2004-09-01), Brumley et al.
K. Arnold, A. Ziemann, A. Raabe, “Tomographic Monitoring of Wind and Temperature at Different Heights Above the Ground”, acta acustica, vol. 87 (2001) 703-708.
Kak, Avinash C. and Slaney,Malcom, Principles of Computerized Tomographic Imaging, IEEE, Press, 1988, pp. 154-155.

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