Sensing Ocean Seafloor Sediment Type via Geologic Scholte Waves using a Fiber-Optic iDASv2
Abstract
Oregon State will obtain high resolution (1 m) textural properties of the seafloor by measuring Scholte waves propagating through the sediments. They will purchase a fiber optic distributed acoustic sensing (DAS) system to measure bottom propagating waveforms of signal over long distances (~ 15 km). DAS combines the extensive, high-density coverage of fully distributed sensing (effectively over 10,000 independent measurements along the cable) with sensitivity that can measure the incoming waveform seen in geophones. Fiber optic sensing is pushing forward our understanding of subaerial acoustics. The proposed Silixa iDASv2 will Oregon Sate to do the same in subaqueous ocean environments of interest to the Office of Naval Research. They expect the tool and give use new perspectives on oceanographic observations. The proposed equipment will be used in collaboration with the Naval Research Laboratory and managed by OSUs CTEMPS. CTEMPS has over 10-years and 100 publications related to distributed fiber optic measurement and has infrastructure in place to share equipment nationally to other universities and national laboratories. Dedicated faculty, staff, and graduate student effort, and immediate installation at on-going coastal experiments will provide for an aggressive pursuit of novel results from the system. Note that this proposal should be considered a secondary request to the iDASv2 DURIP proposal by the same PIs.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jun 17, 2020
- Source ID
- N000142012591
Entities
People
- Meagan Wengrove
Organizations
- Office of Naval Research
- Oregon State University
- United States Navy