Precision Mapping of the Seafloor.
Abstract
State-of-the-art systems for mapping the seafloor with relatively high precision are described. The systems are: (1) multibeam sonar system operating from surface vessel and providing realtime readout of bottom contours; (2) side-scan sonar on deep-towed vehicle, using data from two separate surveys at different elevations; and (3) stereo-camera system operated from a low-flying manned submersible. An experimental side-scan interferometer system is also discussed. Component random errors are assumed for each system, and average resultant horizontal and vertical mapping errors are computed relative to a bottom reference point. Component systematic errors are assumed for the side-scan and stereo-camera systems, and overall mapping errors are computed relative to a bottom reference point. Cost analyses are made of the side-scan and stereo-camera systems. Results of the error and cost analyses indicate that the side-scan interferometer system could be developed to the point where it would be suitable for determining the topograph of a seafloor site to be used for a fixed bottom installation. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1971
- Accession Number
- AD0882352
Entities
People
- R. D. Hitchcock
Organizations
- Naval Facilities Engineering Service Center