NDLI: Comparison of parabolic equation and adiabatic mode propagation models for matched-field processing in range-dependent environments

Content Provider	IEEE Xplore Digital Library
Author	Zala, C.A. Ozard, J.M.
Copyright Year	1992
Description	Author affiliation: Barrodale Comput. Services Ltd., Victoria, BC, Canada (Zala, C.A.; Ozard, J.M.)
Abstract	Matched-field processing of underwater acoustic array data requires a knowledge of the environment and the use of a suitable propagation model from which field replicas can be computed. For range-dependent environment, parabolic equation or mode-based propagation modelling techniques may be used to provide these replicas. A comparison is presented for environments with sloping bottoms, using the order 3 Pade wide angle approximation for the parabolic equation to ensure precision. The numerical simulations involved generation of 'measured' covariance matrices using PE fields; these were then matched with replicas computed using adiabatic modes. The results showed that for slopes up to 2 degrees , the two techniques yield similar matches, but the adiabatic model provides up to a 100-fold speed advantage.
Starting Page	378
Ending Page	383
File Size	445599
Page Count	6
File Format	PDF
ISBN	0780305086
DOI	10.1109/SSAP.1992.246865
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1992-10-07
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Equations Acoustic propagation Geophysics computing Computational modeling Underwater acoustics Geophysical measurements Covariance matrix Content addressable storage Grid computing Mesh generation
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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