Significance and feasibility of a joint assessment of arrival angles and times in experimental tomography methodology

The purpose of this study is to theoretically evaluate the performances of a vertical array in a fluctuating medium by the mean of arrival times-angles diagrams. First, pertinence of using the eikonal approximation to monitor the sound speed structure in a fluctuating ocean and especially to probe m...

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Bibliographic Details
Published inProceedings of OCEANS'94 Vol. 2; pp. II/633 - II/638 vol.2
Main Authors Noel, C., Viala, C., Evennou, F., Stephan, Y.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1994
Subjects
Acoustic pulses
Array signal processing
Content addressable storage
Fluctuations
Monitoring
Oceans
Performance evaluation
Probes
Resumes
Tomography
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Summary:The purpose of this study is to theoretically evaluate the performances of a vertical array in a fluctuating medium by the mean of arrival times-angles diagrams. First, pertinence of using the eikonal approximation to monitor the sound speed structure in a fluctuating ocean and especially to probe meso-structure in the northeastern Atlantic Ocean is discussed. Then, a study of the evolution of tomographic parameters: travel time, temporal spreading, temporal resolution, angular density...based on rays theory is conducted through a synthesis of recent theoretical studies and a parametric approach. Its aim is to quantify and precisely define the undesirable effects induced by the fluctuating medium. These results are compared with those of a statistical study, and then efficiency of an array processing dealing with a joint assessment of arrival angles and times is investigated.< >
ISBN:9780780320567
0780320565
DOI:10.1109/OCEANS.1994.364118