Title :
Inversion in shallow-water using the WKB modal condition
Author :
Shang, E.C. ; Wang, Y.Y. ; Sun, Shaobo
Author_Institution :
Cooperative Inst. for Res. in Environ. Sci., Colorado Univ., Boulder, CO, USA
fDate :
10/1/1996 12:00:00 AM
Abstract :
In this paper, we propose an efficient scheme for extracting the complex bottom reflection coefficient (phase and amplitude) in a shallow water waveguide by using the WKB modal condition. The input data are the measured modal wavenumber (km) and the modal attenuation (βm). The main advantages of this scheme are: 1) it is efficient, because there are no replica calculations as in the conventional matched field processing (MFP) scheme, 2) the inverted error induced by the “noise” of the contaminated data can be estimated analytically, and 3) the impact of the environmental (SSP) mismatch can also be estimated analytically. Numerical simulations illustrate that the proposed scheme works well in different scenarios of shallow water waveguides
Keywords :
acoustic signal processing; acoustic wave reflection; geophysical signal processing; measurement errors; numerical analysis; oceanographic techniques; seafloor phenomena; simulation; underwater sound; WKB modal condition; amplitude; complex bottom reflection coefficient; contaminated data; environmental mismatch; inverted error; matched field processing; measured modal wavenumber; modal attenuation; noise; numerical simulation; phase; replica calculations; shallow water waveguide; Acoustic reflection; Acoustic waveguides; Attenuation; Data mining; Numerical simulation; Oceans; Pollution measurement; Sea measurements; Sun; Water;
Journal_Title :
Oceanic Engineering, IEEE Journal of
