File:Acoustic tomography in the Greenland Sea. (IA acoustictomograp00jose).pdf

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search
Go to page
next page →
next page →
next page →

Original file ‎(1,189 × 1,570 pixels, file size: 3.73 MB, MIME type: application/pdf, 80 pages)

Captions

Captions

Add a one-line explanation of what this file represents

Summary

[edit]
Acoustic tomography in the Greenland Sea.   (Wikidata search (Cirrus search) Wikidata query (SPARQL)  Create new Wikidata item based on this file)
Author
Joseph, John E.;Chiu, Ching-Sang.;Nystuen, Jeffrey A.
image of artwork listed in title parameter on this page
Title
Acoustic tomography in the Greenland Sea.
Publisher
Monterey, California: Naval Postgraduate School;Springfield, Va.: Available from National Technical Information Service
Description
Thesis advisors, Ching-Sang Chiu and Jeffrey A. Nystuen
Thesis (M.S. in Physical Oceanography and Meteorology) Naval Postgraduate School, June 1991
Bibliography: p. 52-53
A six transceiver ocean acoustic tomography array was deployed to monitor ocean ventilation and circulation over the 1988-89 winter cooling season. A stochastic inverse method computer code which attains a solution by minimizing mean square error is used to perform inversions of the Greenland Sea tomography data. A computer simulated ocean is used to evaluate various aspects of system performance. We first consider the advantages and problems associated with using a ray theory based algorithm. Next, we made two adjustments to our inversion code and discuss the effects on system performance. The first adjustment allows for layers of different thicknesses in the inverse solution to increase the density of estimates in regions of interest. The second adjustment allows the estimator to expect variability of the unknown field to decrease exponentially with depth. The ray theory based algorithm is an adequate method of modeling ray paths in the Greenland Sea, but has limitations. Reliability of ray paths degrades as launch angles become shallower and if strong gradients and rapidly changing gradients in sound speed are present in the vicinity of the transceiver elements. A set of Greenland Sea data between one transceiver pair was processed. Although only three groups of eigenrays are involved, initial inversion results indicate the estimator detects seasonal variations and synoptic scale events occurring at time scales greater than 20 days, however, solutions show wide fluctuations at shorter times

Subjects:
Language en_US
Publication date 1 June 1991, 00:00:00
Current location
IA Collections: navalpostgraduateschoollibrary; fedlink; americana
Accession number
acoustictomograp00jose
Notes some content may be lost due to the binding of the book.
Authority file  OCLC: 1038743699
Source
Internet Archive identifier: acoustictomograp00jose
https://archive.org/download/acoustictomograp00jose/acoustictomograp00jose.pdf

Licensing

[edit]
Public domain
This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current06:55, 8 July 2020Thumbnail for version as of 06:55, 8 July 20201,189 × 1,570, 80 pages (3.73 MB)Fæ (talk | contribs)FEDLINK - United States Federal Collection acoustictomograp00jose (User talk:Fæ/IA books#Fork8) (batch 1990-1992 #2827)

You cannot overwrite this file.

Metadata

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:Acoustic_tomography_in_the_Greenland_Sea._(IA_acoustictomograp00jose).pdf&oldid=873177680"