On the effect of error correlation on matched-field geoacoustic inversion.

نویسندگان

  • Chen-Fen Huang
  • Peter Gerstoft
  • William S Hodgkiss
چکیده

The effect of correlated data errors on matched-field geoacoustic inversion for vertical array data is examined. The correlated errors stem from the inability to model the inhomogeneities in the environment resulting in an additional error term beyond ambient noise. Simulated data with these correlated errors are generated and then inverted with or without using the proper covariance matrix. Results show that the correlated error has a negative impact on geoacoustic parameter estimation if not accounted for properly.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Effect of ocean sound speed uncertainty on matched-field geoacoustic inversion.

The effect of ocean sound speed uncertainty on matched-field geoacoustic inversion is investigated using data from the SW06 experiment along a nearly range-independent bathymetric track. Significant sound speed differences were observed at the source and receiving array and several environmental parameterizations were investigated for the inversion including representing the ocean sound speed a...

متن کامل

Range aliasing in frequency coherent geoacoustic inversion.

This paper discusses the effects of frequency selection on source localization and geoacoustic inversion methods that use frequency coherent objective functions. Matched-field processors based on frequency-coherent objective functions often have rapidly fluctuating range ambiguity surfaces. Insufficient sampling in frequency domain results in range aliasing terms that affect geoacoustic inversi...

متن کامل

Inversion For Geoacoustic Model Parameters In Range-Dependent Shallow Water Environments

Our ability to predict acoustic fields in shallow water is limited by the knowledge of the structure and the geoacoustic properties of the bottom, both of which may change with range. The long-term objective of this research project is to investigate broadband matched field inversion methods for estimating geoacoustic model parameters and their uncertainties, in shallow water environments that ...

متن کامل

A Markov Chain Monte Carlo Approach for Geoacoustic Inversion and Source Localization

Gibbs Sampling, a Markov Chain Monte Carlo technique, has been shown to be a powerful tool for geoacoustic inversion and source localization. By providing estimates of posterior joint distributions, it offers a global optimization route for multi-dimensional matched-field processing that reports uncertainty and covariance in addition to point estimates. In this work, Gibbs Sampling is applied t...

متن کامل

Uncertainty analysis in matched-field geoacoustic inversions.

Quantifying uncertainty for parameter estimates obtained from matched-field geoacoustic inversions using a Bayesian approach requires estimation of the uncertainties in the data due to ambient noise as well as modeling errors. In this study, the variance parameter of the Gaussian error model, hereafter called error variance, is assumed to describe the data uncertainty. In practice, this paramet...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • The Journal of the Acoustical Society of America

دوره 121 2  شماره 

صفحات  -

تاریخ انتشار 2007