ONR Graduate Traineeship Award in Ocean Acoustics for Ioannis Bertsatos
Abstract
The long-term goal of this research is to determine necessary conditions on controllable experimental quantities, such as sample size or signal-to-noise ratio (SNR), so that source localization estimates in a fluctuating ocean waveguide can attain design error thresholds. The long-term goal of this research is to develop a method for instantaneously estimating the means and standard deviations of the velocity and position of groups of self-propelled underwater scatterers observed by a long-range remote sensing system. We aim to obtain these estimates based on an analytical expression for the magnitude squared of the range-velocity ambiguity function of the acoustic field scattered from such target groups. The primary objectives of the research are to: * Derive an analytical expression for the second-order covariance of MLEs obtained from general complex Gaussian data vectors when both the measurement mean and variance are parameter dependent. * Determine conditions on sample size and SNR so that source localization estimates attain desired error thresholds in a fluctuating ocean waveguide. * Quantify the effects of ocean fluctuations on the biases and errors of parameter estimates. * Derive an analytical expression for the range-velocity ambiguity function of the acoustic field scattered from underwater target groups. * Develop a method for distinguishing and classifying groups of underwater targets by estimating their second-order velocity and position statistics. * Publish work already completed on optimally estimating Lambertian surface orientation with application to high frequency sonar imaging.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2009
- Accession Number
- ADA531383
Entities
People
- Ioannis Bertsatos
- Nicholas C. Makris
Organizations
- Massachusetts Institute of Technology