Ocean Bottom Conductivity Database Development
Abstract
The Office of Naval Research has sponsored the development of a performance prediction capability for magnetic minesweeping. The N-Layered Magnetic Model is used to predict the expected performance of U.S. Navy magnetic minesweeping equipment. This model has been accepted by the Oceanographic and Atmospheric Master Library (OAML) as the standard model for computing the magnetic fields generated by U.S. sweeps and other equipment. One required environmental input to the N-Layered Model is conductivity versus depth in the ocean bottom. This type of oceanographic data is not readily observable. Historically, it has been obtained by conducting ocean bottom resistivity surveys using the MACAS system. MACAS data, however, is not available for many critical areas. The MACAS system is highly accurate, but is expensive to deploy and use and is not suitable for data acquisition in denied-access areas. We have developed a technique for estimating conductivity versus depth in the ocean bottom using historical oceanographic and ocean bottom geophysical data. The object of our FY98 effort is to refine this technique so that it may be used to populate data bases of electrical reflection coefficient Q and the electrical depth ED in areas for which no MACAS data is available.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1998
- Accession Number
- ADA544816
Entities
People
- Marshall Bradley