Accession Number : ADA324693

Title :   Digitization and Reanalysis of Analog Sonobuoy Records.

Descriptive Note : Final rept.,

Corporate Author : TRUSTEES OF COLUMBIA UNIV NEW YORK

Personal Author(s) : Diebold, John B.

PDF Url : ADA324693

Report Date : SEP 1996

Pagination or Media Count : 9

Abstract : Most published information on age-dependent changes in the physical properties of upper oceanic crust (layer 2A) was based on the interpretation of analog airgun-sonobuoy records. New technology, developed at Lamont during an earlier ONR-funded project, allows digitization (via scanning) and computer-based analysis, via interactive ray tracing. The digitization process was applied to 142 analog records from sonobuoys located on Pacific ocean crust with well determined ages between zero and 10 my. Initial analysis was begun, and the records were evaluated and sorted into three categories depending on whether the necessary arrivals for 2A velocity determination were present. 50 = 'yes', 55 = 'maybe', 37 = 'no'. At this point, funding was withdrawn due to the termination of the crustal evolution project and reassignment of its program manager.

Descriptors :   *SONOBUOYS, *OCEANIC CRUST, INTERACTIONS, PHYSICAL PROPERTIES, EVOLUTION(GENERAL), EARTH CRUST, PACIFIC OCEAN, COMPUTER AIDED DIAGNOSIS, ANALOG TO DIGITAL CONVERTERS, RAY TRACING.

Subject Categories : Physical and Dynamic Oceanography
      Acoustic Detection and Detectors
      Computer Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE