Publications [#66570] of Jeffrey L. Krolik

Papers Published

1. Krolik, Jeffrey L. and Narasimhan, Sunil, Cramer-rao bound on acoustic measurement of ocean climate change in the presence of mesoscale sound-speed variability, ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, vol. 5 (1995), pp. 2771 - 2774, Detroit, MI, USA [ICASSP.1995.479419]
   (last updated on 2007/04/16)

   Abstract:
   The ability to measure climate-related mean changes in ocean temperature is fundamentally limited by the presence of mesoscale variability. In this paper, the Cramer-Rao Lower Bound on the estimation of the mean depth-dependent temperature profile is evaluated to determine the highest accuracy which could be achieved by acoustic thermometry of ocean climate (ATOC). Evaluation of the bound is performed using a model of sound-speed variability derived from real Pacific ocean environmental data. Results indicate that a low-order Chebyshev polynomial may be a good choice for climate signal representation. The general behavior the bound is determined by a subtle interaction between the climate signal basis, a priori mesoscale noise statistics, and observation-time-bandwidth-signal-to-noise ratio product.

   Keywords:
   Underwater temperature measurement;Oceanography;Thermometers;Climate change;Acoustic wave transmission;Acoustic signal processing;Chebyshev approximation;Polynomials;Signal to noise ratio;Random processes;Perturbation techniques;Fourier transforms;