GLORIA

GEOMAR Library Ocean Research Information Access

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 11
    Publication Date: 2022-05-26
    Description: This report describes a system for underwater acoustic navigation developed, and in use, at the Woods Hole Oceanographic Institution. It includes a brief discussion of the electronic components, operation, mathematical analysis, and available computer programs. There is a series of supplementary Technical Memoranda containing more information on various aspects of the system. We believe that this kind of documentation is more flexible and better meets the needs of potential users than including all technical details in one large volume. These are not final or definitive reports; acoustic navigation capabilities will continue to evolve at W.H.O.I. for some time. Acoustic navigation provides a method of tracking a ship, and an underwater vehicle or instrument package (‘fish’), in the deep ocean. Acoustic devices attached to the ship and fish measure the length of time it takes a sound pulse to travel to acoustic transponders moored on the ocean floor. If the transponder positions and the average speed of sound are known, the ship or fish position can be found.
    Description: Prepared for the Office of Naval Research under Contracts N00014-71-C0284; NR 293-008 N00014-70-C0205; NR 263-103 and the National Science Foundation/International Decade of Ocean Exploration Grant GX-36024 and the Applied Physics Laboratory of The Johns Hopkins University Contract 372111.
    Keywords: Alvin (Submarine) ; Underwater navigation ; Underwater acoustics
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 12
    Publication Date: 2022-05-26
    Description: A system has been developed recently at W.H.O.I. for tracking nearsurface drogues equipped with sonobuoys using an acoustic navigation system. Surface and submerged drogues of mean depths ranging from 0.15 m to 4.88 m were tracked in the vicinity of deepwater dumpsite #106 . A least squares linear regression technique was used to determine drogue velocities over 2 hour periods. Water velocities at depths from 8 - 110 m were measured using a ship-deployed current meter coupled with acoustic tracking of the ship. The results indicated very little velocity shear in the surface mixed layer. There were two regions of _strong shear at greater depths, one associated with the main thermocline and the other presumably associated with a halocline .
    Description: Prepared for the Department of Energy under Contract DE-AC02-79EV10005 and NOAA under Grant 04-8-M01-62
    Keywords: Acoustically tracked drogues ; Ocean currents ; Waste disposal in the ocean
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 13
    Publication Date: 2022-05-26
    Description: This report describes a series of tests performed at SIO/MPL, Point Lorna the week of 17 November 1997 designed to achieve integration of the Broadband Borehole Seismic System (BBBSS) in preparation for the OSN Pilot Experiment cruise on RN Thompson during January 1997. Representatives from all groups were present (see appendix A), with their respective parts of the system and support equipment. It was anticipated that these tests would result in the complete integration of the various components of the borehole seismometer system in preparation for the January cruise. The system would be assembled and tested following a plan (see appendix C) that would culminate in the fully integrated borehole seismometer being wet tested off the MPL pier.
    Description: This work is sponsored by the National Science Foundation Grant Nos. OCE 9522114and OCE 9523541 with additional support from Scripps Institute of Oceanography and Woods Hole Oceanographic Institution
    Keywords: Borehole gravimetry
    Repository Name: Woods Hole Open Access Server
    Type: Working Paper
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...