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High Fidelity Clutter Model for Active Sonar

Award Information

Agency:
Department of Defense
Branch:
Navy
Award ID:
87553
Program Year/Program:
2008 / SBIR
Agency Tracking Number:
N081-056-0538
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Applied Physical Sciences Corp.
475 Bridge Street Suite 100 Groton, CT -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2008
Title: High Fidelity Clutter Model for Active Sonar
Agency / Branch: DOD / NAVY
Contract: N65538-08-M-0099
Award Amount: $69,996.00
 

Abstract:

Active sonar clutter usually appears on a display as an amalgamation of point scatterers that exhibit both object and individual reflective and kinematic behavior. We propose to demonstrate the feasibility of constructing a realistic active sonar clutter model based on a few generalized concepts to synthesize most clutter types observed on Mid-Frequency active sonars. Realism is achieved by using the statistics of known clutter object attributes obtained from existing databases. The clutter model uses superellipsoids to define basic building blocks. Each type of clutter block is populated with discrete point scatters. The population, density, scattering coefficient, velocity, and fading characteristics of the scatterers are described using the appropriate statistics. The acoustic propagation response function for each scatterer is obtained using a high fidelity acoustic model. A realistic time series of a clutter object echo is obtained by convolving the transmit waveform with the system, propagation and clutter object response functions. Because all the functions, save one, are represented as delta functions, this is not computationally intensive. The model includes the effects of own ship motion, the specific sonar design, waveforms, and acoustic propagation including attenuation and multipath arrivals. The clutter exhibits deterministic and stochastically dependent, spatial, temporal, and intensity characteristics.

Principal Investigator:

Paul Koenigs
Principal Scientist
8604483253
pkoenigs@aphysci.com

Business Contact:

David Horne
Sr Vice President/CFO
8604483253
dhorne@aphysci.com
Small Business Information at Submission:

APPLIED PHYSICAL SCIENCES CORP.
475 Bridge Street Suite 100 Groton, CT 06340

EIN/Tax ID: 010655626
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No