Acoustic Tomography of the Atmosphere
Final rept. 1 Jun 2003-28 Feb 2007
NEW MEXICO STATE UNIV LAS CRUCES
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In this project, theoretical foundations for construction and operation of the state-of-the-art array for acoustic tomography of the atmosphere were developed. The array was built at the Boulder Atmospheric Observatory under the ARO sponsorship, project DAAD19-03-1-0341. First, the travel times of sound propagation between different pairs of sources and receivers of the array were expressed in terms of the temperature and wind velocity fields within the tomographic volume. Then, a solution of the inverse problem - the reconstruction of the temperature and velocity fields from the measured travel times - was studied in detail. A new inverse algorithm for solution of the inverse problem in acoustic tomography of the atmosphere, time-dependent stochastic inversion TDSI, was developed. Numerical simulations of acoustic tomography of the atmosphere showed that TDSI gives much better reconstruction of temperature and velocity fields than other inverse algorithms known in the literature. Then, TDSI was used in 2D outdoor and indoor tomography experiments carried out by scientists from the University of Leipzig, Germany. As a result, the temperature and velocity fields within tomographic areas were reconstructed and monitored in time. The developed TDSI algorithm will be used in operation of the state-of-the-art array for acoustic tomography of the atmosphere.
- Acoustic Detection and Detectors