| Measuring Shallow Sediment Velocity Structure with CDP Gathers and Sonobuoy Profiles |
31 AUG 1999 |
22 pages |
| Authors:
John B. Diebold; TRUSTEES OF COLUMBIA UNIV NEW YORK
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 | As part of USNS Bowditch Cruise 621098, a high resolution MCS reflection survey of the Persian Gulf, 48 NAVO-supplied sonobuoys were deployed and recorded. 32 of these returned useful data, the analysis if which is presented here. The principal purpose of this study was to determine detailed shallow velocity structure which would complement those obtained as part of the MCS processing and analysis. Two analysis methods were employed: interactive ray ... |
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| MCS Transects of the Gorda Rise and Costa Rica Rift: Two ONR-Funded Surveys aboard R/V Ewing |
02 JUL 97 |
21 pages |
| Authors:
John B. Diebold; Carolyn Z. Mutter; TRUSTEES OF COLUMBIA UNIV NEW YORK
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| The consensus reached at the ONR Workshop on Investigations of Young Oceanic Crust, held at Friday Harbor, Washington in March of 1993, was that marine geophysical surveys should be conducted in one or more 'corridors' in the Eastern Pacific. It was recognized that multichannel seismic MCS reflection profiling was an important part of such surveys, despite their relatively high cost. Excellent results were gained during two such profiling efforts, which ... |
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| Digitization and Reanalysis of Analog Sonobuoy Records |
SEP 96 |
9 pages |
| Authors:
John B. Diebold; TRUSTEES OF COLUMBIA UNIV NEW YORK
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| 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 ... |
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| Portable High-Resolution Multichannel Seismic System User Guide |
APR 96 |
12 pages |
| Authors:
John B. Diebold; LAMONT-DOHERTY EARTH OBSERVATORY PALISADES NY
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| This DURIP award funded the acquisition of the basic components of a new, portable, high resolution MCS system. Equipment will allow ONR and NSF-fund researchers to image sedimentary structures in a variety of geologic settings but particularly appropriate for shallow water applications. Major items purchased were the 48-channel hydrophone array, four of the seven depth controllers for that array, and the compressor, which supplies air for the source array. ... |
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| Digitization and Reanalysis of Analog Sonobuoy (ASPER) Records |
29 JUL 93 |
5 pages |
| Authors:
John B. Diebold; LAMONT-DOHERTY EARTH OBSERVATORY PALISADES NY
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| This project involved a multifaceted approach for making the database of analog sonobuoy records and solutions at Lamont more accessible to NAVO (stennis) personnel. Each item on a list of seven deliverables was transmitted to NAVO, either in person or by electronic mail: (1) New raytraced solutions of thirty-eight shallow-water sonobuoys recorded aboard Lamont ships in the East China Sea were obtained by iterative ... |
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