National_Catalogues: Time-Dependent Stochastic Inversion in Acoustic Tomography of the Atmosphere with Reciprocal Sound Transmission

Title: Time-Dependent Stochastic Inversion in Acoustic Tomography of the Atmosphere with Reciprocal Sound Transmission
Identifier: ADA500711
STOAbstractExternal: Time-dependent stochastic inversion (TDSI) was recently developed for acoustic travel-time tomography of the atmosphere. This type of tomography allows reconstruction of temperature and wind-velocity fields given the location of sound sources and receivers and the travel times between all source?receiver pairs. The quality of reconstruction provided by TDSI depends on the geometry of the transducer array. However, TDSI has not been studied for the geometry with reciprocal sound transmission. This paper is focused on three aspects of TDSI. First, the use of TDSI in reciprocal sound transmission arrays is studied in numerical and physical experiments. Second, efficiency of time-dependent and ordinary stochastic inversion (SI) algorithms is studied in numerical experiments. Third, a new model of noise in the input data for TDSI is developed that accounts for systematic errors in transducer positions. It is shown that (i) a separation of the travel times into temperature and wind-velocity components in tomography with reciprocal transmission does not improve the reconstruction, (ii) TDSI yields a better reconstruction than SI and (iii) the developed model of noise yields an accurate reconstruction of turbulent fields and estimation of errors in the reconstruction.

STOAuthorExternal: NEW MEXICO STATE UNIV LAS CRUCES DEPT OF PHYSICS Vecherin, Sergey N., Ostashev, Vladimir E., Wilson, D. K., Ziemann, A.
STOClassificationExternal: N
STOKeywordsExternal: *TDSI(TIME-DEPENDENT STOCHASTIC INVERSION), TRAVEL-TIME TOMOGRAPHY, REMOTE SENSING, TOMOGRAPHY OF THE ATMOSPHERE, TEMPERATURE AND WIND VELOCITY FIELDS, STOCHASTIC INVERSION, PE206022A
STOPublisher: USA
Language: English
STOReportSource: http://www.dtic.mil/docs/citations/ADA500711
Published: 10/17/2008

Created at 11/9/2016 3:26 PM by System Account
Last modified at 11/9/2016 3:26 PM by System Account
 
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