Title :
Tomographic inversion of the El Nino profile by using a matched-mode processing (MMP) method
Author :
Shang, E.C. ; Wang, Y.Y.
Author_Institution :
Cooperative Inst. for Res. in Environ. Sci., Colorado Univ., Boulder, CO, USA
fDate :
4/1/1994 12:00:00 AM
Abstract :
A high-resolution mode-matching (HRMM) estimator is used to invert El Nino profile perturbations. By matching a proper set of modal travel time perturbations in a 2-D parameter space constructed by the first two coefficients of the empirical orthogonal function (EOF), the El Nino profile can be efficiently inverted. As contrasted with the conventional linear inversion scheme, the performance of the matched-mode scheme is significantly improved because the nonlinearity of the modal travel time perturbation has been taken into account
Keywords :
El Nino Southern Oscillation; acoustic signal processing; digital simulation; nonlinear acoustics; oceanographic techniques; signal detection; underwater sound; 2D parameter space; El Nino profile; empirical orthogonal function; estimator; matched-mode processing; modal travel time perturbation; modal travel time perturbations; nonlinearity; tomographic inversion; Acoustic signal detection; Atmospheric waves; Fluctuations; Inverse problems; Monitoring; Ocean temperature; Parameter estimation; Sea measurements; Sea surface; Tomography;
Journal_Title :
Oceanic Engineering, IEEE Journal of
