Academic Journal
Environmental Complexity and Stochastic Modeling of High-Frequency Acoustic Scattering From the Seafloor
| العنوان: | Environmental Complexity and Stochastic Modeling of High-Frequency Acoustic Scattering From the Seafloor |
|---|---|
| المؤلفون: | Jones, Christopher D. |
| المساهمون: | WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB |
| المصدر: | DTIC AND NTIS |
| سنة النشر: | 2005 |
| المجموعة: | Defense Technical Information Center: DTIC Technical Reports database |
| مصطلحات موضوعية: | Physical Chemistry, Physical and Dynamic Oceanography, Operations Research, Acoustics, ACOUSTICS, ACOUSTIC SCATTERING, SEDIMENTS, MATHEMATICAL MODELS, DATA PROCESSING, UNCERTAINTY, HIGH FREQUENCY, STOCHASTIC PROCESSES, PREDICTIONS, STATISTICAL ANALYSIS, OCEAN BOTTOM, HYDRODYNAMICS, SIMPLIFICATION, OCEAN ENVIRONMENTS, STRATIFICATION, ACOUSTIC EQUIPMENT, PHYSICAL PROPERTIES, DEPOSITION, DEPOSITS, CLUSTERING, RIPPLES, HETEROGENEITY, HIGH FREQUENCY SEAFLOOR ACOUSTICS, SEAFLOOR SEDIMENTS, BACKSCATTER, BIOGENIC DEPOSITS |
| الوصف: | Models of acoustic scattering from the seafloor generally assume that sediment heterogeneity is statistically homogeneous with single-scale correlation structure. Current statistical descriptions of the seafloor are incapable of capturing information about complex seafloor heterogeneities that are often encountered in marine environments (e.g. non-uniform or clustered scatterers, patchiness in the sediment physical properties). Seafloor complexity is due to a variety of processes including bioturbation (burrows, fish pock marks), biogenic deposits (shell lags), hydrodynamics factors (ripples), and geological processes that create stratification and non-uniform deposition (flaser bedding), for example. An overly simplified description of the seafloor will lead to errors in acoustic model predictions, uncertainty in interpreting measurements of acoustic scattering, and unreliable inversions for environmental parameters. This investigation addresses the effects of complex and non-Gaussian seafloor heterogeneity on scattering. A combination of numerical modeling, stochastic process modeling, and field data analysis are employed to investigate the errors and uncertainty associated with using incomplete models of seafloor randomness. ; The original document contains color images. |
| نوع الوثيقة: | text |
| وصف الملف: | text/html |
| اللغة: | English |
| Relation: | http://www.dtic.mil/docs/citations/ADA436394 |
| الاتاحة: | http://www.dtic.mil/docs/citations/ADA436394 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA436394 |
| Rights: | Approved for public release; distribution is unlimited. |
| رقم الانضمام: | edsbas.C51E1540 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |