Development of a Modified Time Delay Spectrometry Technique for Underwater Acoustic Measurements in a Multipath Environment.

reportActive / Technical Report | Accession Number: ADA152111 | Open PDF

Abstract:

A measurement technique has been developed which makes possible the determination of the acoustic transmission loss for various paths between a source and a receiver at relatively short ranges in the ocean. The method is based upon a technique called Time Delay Spectrometry TDS. The theory for utilizing TDS to perform measurements on an underwater test range with a homogeneous water column is presented. The experimental parameters concerning test geometry together with criteria for the source signal are discussed and the limitations are described. A computer program written in HP BASIC is the tool in a multipath measurement system where analog sound signals recorded on tape are processed by an HP 356A Dynamic Signal Analyzer under program control. Originator-supplied keywords include Time Delay Spectrometry TDS, Under water acoustic propagation, Dynamic signal analyzer, Linear frequency modified pulse LFM pulse.

Author(s):
Brekke, B.
Author Organization(s):
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
Descriptive Note:
Master's thesis,
Pagination:
0096

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_6.3.3_Spectrum Management; JCA_6_Net Centric; JCA_6.3_Net Management; JCA_6.1_Information Transport; JCA_3.2_Engagement; JCA_3_Force Application; JCA_3.2.1_Kinetic Means; JCA_1_Force Support; JCA_4.6_Engineering; JCA_1.2_Force Preparation; JCA_1.2.7_Experimentation; JCA_1.2.6_Concepts; JCA_5.2_Understand
Communities of Interest:
Weapons Technologies
Descriptor(s):
*ACOUSTIC MEASUREMENT, *UNDERWATER ACOUSTICS, COMPUTER PROGRAMS, TIME INTERVALS, SPECTROMETRY, PULSES, SOUND TRANSMISSION, DELAY, ACOUSTIC SIGNALS, SEA WATER, ANALOG SIGNALS, TRANSMISSION LOSS, MULTIPATH TRANSMISSION, HOMOGENEITY, SOUND ANALYZERS, ACOUSTIC RANGES
Field(s)/Group(s):
Acoustic Detection and Detectors, Acoustics
Keyword(s):
TDS(TIME DELAY SPECTROMETRY), LFM(LINEAR FREQUENCY MODIFIED), Linear frequency modified pulses
Report Date:
1984 Dec 01