Improving the Physics of Applied Reverberation Models

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-15-C-0129
Agency Tracking Number: N13A-026-0045
Amount: $749,885.00
Phase: Phase II
Program: STTR
Awards Year: 2015
Solicitation Year: 2013
Solicitation Topic Code: N13A-T026
Solicitation Number: 2013.0
Small Business Information
5860 Trinity Parkway, Suite 200, Centreville, VA, 20120-2400
DUNS: 135121148
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Robert Blanchard
 Prinicipal Investigator
 (703) 968-8040
Business Contact
 Judy Barhorst
Title: PMA264-Adv. Dev. IPT Lead
Phone: (703) 968-8040
Research Institution
 University of Washington
 Lynette Arias
 1013 NE 40th Street
Seattle, WA, 98105
 () -
 Nonprofit college or university
The proposed effort will enhance the capability of the Acoustic System Performance Model (ASPM) and its implementation of the ASEPS Transmission Loss (ASTRAL) model by adding to it a treatment of several physical phenomena. Research in recent years has demonstrated that sea surface forward scatter consists of coherent and incoherent components with both having profound impact on reverberation. The TOTLOS model has been developed to account for these, with recent improvements to allow for a wide range of sediment speeds and account for more general surface roughness spectra. In addition, previous integration of low-frequency bottom loss algorithms within ASPM will be investigated for expansion to substantially higher frequencies to provide more realistic bottom characterization. Refinements will also be made to further simplify the code base of ASPM with a goal of speed improvement. Modeling improvements will be validated with measured data sets and environmental inputs from the Office of Naval Research Target and Reverberation Experiment (TREX13) project. Documentation will be developed to support ASPM approval through the Oceanographic and Atmospheric Master Library (OAML) process. Preliminary integration will be performed using research and development mission planning software for multistatic active sonobuoy systems.

* Information listed above is at the time of submission. *

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