Accession Number:

ADA571817

Title:

Quantifying, Predicting, and Exploiting Uncertainty (QPE)

Descriptive Note:

Annual rept.

Corporate Author:

WOODS HOLE OCEANOGRAPHIC INSTITUTION MA

Personal Author(s):

Report Date:

2011-09-01

Pagination or Media Count:

5.0

Abstract:

The long term goal of our QPE work is to 1 quantitatively understand what the uncertainties are in low frequency 10-1500 Hz acoustic propagation and noise that are caused by variable and complex oceanography and seabed structure, 2 determine the limits to predicting the fluctuating and variable propagation and noise in this frequency regime and others, and 3 ascertain what naval advantage may be gained if any by understanding the nature of the uncertainty. Our continuing primary objectives this year were to analyze the data from the main experiment in the East China Sea in 2009, and to work towards explanations of what was observed. Particular emphasis was placed on 1 ambient noise data analysis, and 2 the theoretical explanation of the azimuthal anisotropy of transmission loss TL observed. The impacts of our work so far are that we have seen interesting effects concerning 1 azimuthal anisotropy, 2 ambient noise, and 3 propagation over slopes and canyons that may have naval sonar implications. We also are tying in to the larger Prediction, Quantification, and Exploitation of Uncertainty theme via the Dyer PPD. One eventual transition of our work will be to naval sonar systems and to sonar analysis, where the interest is in the error bars in ocean acoustic field and system performance prediction.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Statistics and Probability
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE