NDLI: Mooring Motion Monitoring Acoustic Navigation System

Content Provider	IEEE Xplore Digital Library
Author	Nowak, R.T. Mealy, S.F.
Copyright Year	1981
Description	Author affiliation: Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA (Nowak, R.T.)
Abstract	A long path, low frequency, acoustic tomography experiement is being conducted in the North Atlantic by members of the Scripps Oceanographic Institute, Massachusetts Institute of Technology and woods Hole Oceanographic Institution. Long, single-wire moorings are used to mount the necessary instrumentation. A high frequency acoustic navigation system monitors mooring motion to reduce degradation of the acoustic data by this source of error. The navigation system consists of a microprocessor controlled transceiver mounted at the top of the mooring and three recoverable transponders anchored on the bottom approximately one water depth away from the mooring anchor. At predetermined intervals, the transceiver simultaneously interrogates the three transponders and measures the round trip travel times. These data are recorded along with the time and date of the measurement on a small, single-track tape recorder. Each transponder is mounted within a self-buoyant glass housing and can be commanded to release for recovery. A 1.25 watt-second flash is also incorporated in the housing to aid in recovery. This paper describes the design of the transceiver and recoverable transponders and gives results from a short-term development.
Starting Page	793
Ending Page	796
File Size	663715
Page Count	4
File Format	PDF
DOI	10.1109/OCEANS.1981.1151462
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1981-09-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Monitoring Navigation Transponders Transceivers Frequency Sea measurements Tomography Marine technology Instruments Degradation
Content Type	Text
Resource Type	Article

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