A comparison of observed and predicted ambient noise in the Northeast Pacific, winter 1980
By: Kent L. Raysin
Contributors: Naval Postgraduate School (U.S.). Department of Oceanography
Publisher: Naval Postgraduate School
Published: 1984
Place of publication: Monterey, California
Language: eng
Format: [electronic resource] /
Number of pages: 78
Subjects: Measurement; Databases; Danes; Ocean; Synchronization; Time; Winds; Academic Dissertations; Underwater acoustics
Description: Hindcasts from the Directional Ambient Noise Estimation System (DANES) model were compared to in situ ambient noise measurements to determine the accuracy of the U.S. Navy's ambient noise model. One hundred fifty eight (158) sonobuoy ambient noise measurements were acquired at eight locations in the Northeast Pacific (NEPAC) Ocean during November and December 1980. For each sonobuoy observation a DANES hindcast was made using archived fields from Fleet Numerical Oceanography Center for the simultaneous time and location. The difference between the predictions and measurements was calculated. A maximum mean error of 4.9 dB occurred at 200 Hz which appeared to be due to errors in the DANES Historical Temporal Shipping (HITS) data base. The model was insensitive to synoptic shipping, sound speed profiles and wind field inputs when the HITS data base was utilized.
Notes: Thesis Advisor(s): Dunlop, Calvin R. ; Second Reader: Jung, Glenn H.

June 1984.

Author(s) subject terms: DANES - Ambient Noise - Northeast Pacific - ASTREX

Description based on title screen as viewed on April 12, 2012.

DTIC Descriptor(s): Ambient Noise, Underwater Sound, Acoustic Velocity, Computerized Simulation, Data Bases, East(Direction), Measurement, Models, Noise(Sound), North Pacific Ocean, Observation, Oceans, Profiles, Sonobuoys, Synchronism, Theses, Time, Wind

DTIC Identifier(s): Danes Computer Program, HITS(Historical Temporal Shipping)

Prepared for: Naval Electronics Systems command (Elex 612), Washington, D.C.

NPS 68-84-009.

Technical Report.

Print copy is available by special arrangement, for use on-site at Dudley Knox Library during Special Collections reading room hours.

Thesis (M.S. in Meteorology and Oceanography)--Naval Postgraduate School, June 1984.

Includes bibliographical references (p. 73-76).

Approved for public release, distribution unlimited--Cover.

Funded by: N0003984WRDUO04

Mode of access: World Wide Web.

System requirements: Adobe Acrobat Reader.