Broadband Low-Frequency Measurement of a Deep-Ocean Acoustic Channel.
Abstract
The objective of this study is to explore the feasibility of measuring appropriate fluctuation statistics of the channel, as observed in an operationally realistic situation, by coherent processing of such precisely controlled, broadband signals. In order to design a deep ocean system (active surveillance, acoustical communications, transient detection and classification, etc.) and to predict its performance, the propagation characteristics of the channel must be understood and modelled in considerable detail. Fluctuations are particularly important to system performance; in general, a statistical model of fluctuations is called for, having only a few parameters. Chapter 2 contains a theoretical discussion of the propagation in the context of simple ray theory. It is seen that the major features of the data are consistent with ray theory, although no attempt at a quantitative comparison is made. Chapter 3 contains a discussion of measurement artifacts that may have distorted the results of the analysis. These are examples of effects that must be avoided, in advance planning, if the fluctuation statistics of the ocean transmission path alone are to be measured. Chapter 4 presents a selection of the data and the results of analysis. The results are discussed in Chapter 5.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1981
- Accession Number
- ADA107684
Entities
People
- A. W. Karp
- J. C. Heine
- P. W. Smith Jr.
Organizations
- BBN Technologies