Characterization of Uncertainty in Low Frequency Active Sonar
Abstract
LONG-TERM GOALS. The goals of this project are to characterize and evaluate the effects of uncertainty on low frequency impulsive active sonars of the type exemplified by Distant Thunder (DT) or Extended Echo Ranging (EER). This project is a component of the UNITES effort aimed at (i) comprehending uncertainty in the ocean environment and characterizing its impact on tactical sonar performance, and (ii) providing the Navy with guidance for understanding sonar performance in the littoral. OBJECTIVES. Performance prediction models are used to characterize expected operational capabilities of sonars. In the best situation, uncertainty of sonar performance can be effectively described by the signal-to-interference ratio (SIR) environmentally-induced probability density function (SIRE-PDF), which is the distribution of the difference between measured and modeled SIR, and describes the predictive capability of the present model (that is, for specific location and time) with respect to actual performance. Thus, the SIRE-PDF accounts for the inherent unmodeled variability of the environment and is a probabilistic description of intrinsic environmental uncertainty. The focus of this effort is to formulate and evaluate significant examples of SIRE-PDF for low frequency impulsive active sonars.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2003
- Accession Number
- ADA628360
Entities
People
- Peter G. Cable