A metric for characterization of two-dimensional spatial coherence

Daniel C. Brown; Cale F. Brownstead; Thomas B. Gabrielson; Anthony P. Lyons

doi:10.1121/1.5001163

A metric for characterization of two-dimensional spatial coherence

Daniel C. Brown, Cale F. Brownstead, Thomas B. Gabrielson, Anthony P. Lyons

Applied Research Laboratory (ARL)

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

A metric is developed providing a quantitative measure of the two-dimensional spatial coherence of scattered fields. The metric is based on fitting a function similar to bivariate Gaussian to measured two-dimensional coherence surfaces. This function provides a robust fit to the measured data for a range of coherence lengths and surface asymmetries. Through an eigendecomposition of the bivariate Gaussian covariance matrix, it is possible to define surface orientation as well as coherence lengths along the major and minor axes. The metric is applied to normal-incidence scattering data collected in recent field trials at Seneca Lake, NY.

Original language	English (US)
Pages (from-to)	EL313-EL318
Journal	Journal of the Acoustical Society of America
Volume	142
Issue number	3
DOIs	https://doi.org/10.1121/1.5001163
State	Published - Sep 1 2017

All Science Journal Classification (ASJC) codes

Arts and Humanities (miscellaneous)
Acoustics and Ultrasonics

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10.1121/1.5001163

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title = "A metric for characterization of two-dimensional spatial coherence",

abstract = "A metric is developed providing a quantitative measure of the two-dimensional spatial coherence of scattered fields. The metric is based on fitting a function similar to bivariate Gaussian to measured two-dimensional coherence surfaces. This function provides a robust fit to the measured data for a range of coherence lengths and surface asymmetries. Through an eigendecomposition of the bivariate Gaussian covariance matrix, it is possible to define surface orientation as well as coherence lengths along the major and minor axes. The metric is applied to normal-incidence scattering data collected in recent field trials at Seneca Lake, NY.",

author = "Brown, {Daniel C.} and Brownstead, {Cale F.} and Gabrielson, {Thomas B.} and Lyons, {Anthony P.}",

note = "Funding Information: The authors would like to acknowledge the U.S. Office of Naval Research for their support of this research. This work was conducted under the following grants and contracts Nos. N00014-15-G-0001/0009, N00014-14-1-0566, and N00014-16-1-2313. Publisher Copyright: {\textcopyright} 2017 Acoustical Society of America.",

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AU - Brownstead, Cale F.

AU - Gabrielson, Thomas B.

AU - Lyons, Anthony P.

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A metric for characterization of two-dimensional spatial coherence

Abstract

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