Capturing Uncertainty in the Common Tactical/Environmental Picture: NRL/Stennis Contributions
Abstract
LONG-TERM GOALS. The primary objective of this project is to use existing science to characterize and represent the uncertainty in the tactical and environmental picture due to uncertainty about environmental features that affect active acoustic detection of submarines. OBJECTIVES. NRL/Stennis is responsible for providing the best possible estimates of the sound speed, geo-acoustic parameters, and their uncertainties to the other members of the team. APPROACH. Work is being accomplished by a team headed by APL/UW that includes NRL-SSC, Oregon State University (OSU), ARL-UT, and Metron Corp., all funded under the ONR Capturing Uncertainty Departmental Research Initiative (DRI). NRL-DC is contributing valuable work as well, funded by ONR outside the DRI. NRL-SSC is providing the best ground truth sound speed profile and geo-acoustic data possible for the geographic area selected for analysis. Initially, the sound speed and uncertainty were provided by the Modular Ocean Data Assimilation System (MODAS) and extractions from a global implementation of the Navy Coastal Ocean Model (NCOM). Models such as NCOM include atmospheric forcing effects and should be able to represent the near-surface layers more accurately. A baseline geo-acoustic environment for the initial study area was constructed using existing core samples, grab samples, echo sounder data, chirp sonar, seismic data, acoustic data, and representations of the climatological and sedimentary history.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2003
- Accession Number
- ADA628200
Entities
People
- Alex C. Warn-varnas
- Daniel N. Fox
- James K. Fulford
- Patrick C. Gallagher
Organizations
- United States Naval Research Laboratory