Sergey N Vecherin et al 2008 Meas. Sci. Technol. 19 125501 doi:10.1088/0957-0233/19/12/125501
Sergey N Vecherin1,2,5, Vladimir E Ostashev1,3, D Keith Wilson2 and A Ziemann4
Show affiliationsTime-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.
43.28.Lv Statistical characteristics of sound fields and propagation parameters
43.38.Hz Transducer arrays, acoustic interaction effects in arrays
92.60.hh Acoustic gravity waves, tides, and compressional waves
Issue 12 (December 2008)
Received 14 March 2008, in final form 31 July 2008
Published 17 October 2008
Sergey N Vecherin et al 2008 Meas. Sci. Technol. 19 125501