A. Caiti andy@dist.unige.it
DIST - Universitá di Génova
Via Opera Pia 13, IT-16145
Génova, Itália
S.M. Jesus sjesus@ualg.pt
UCEH - Universidade do Algarve,
Campus de Gambelas,
PT-8000 Faro Portugal.
Comments: download pdf file .
Ref.: Journal of the Acoustical Society of America,
Vol.
100(3), p. 1473-1481, 1996.
Abstract
A novel approach to the estimation of seafloor geoacoustic parameters
from
the measurement of the acoustic field in the water column is
introduced.
The approach is based on the idea of approximating the inverse function
that links the geoacoustic parameters with the measured field through a
series expansion of Radial Basis Functions. In particular, Gaussian
basis
functions are used in order to ensure continuity and smoothness of the
approximated
inverse. The main advantage of the proposed approach relies on the fact
that the series expansion can be computed off-line from simulated data,
as
soon as the experimental configuration is known. Data inversion can
then
be performed in true real time as soon as the data are acquired.
Simulation
results are presented in order to show the advantages and limitations
of
the method. Finally, some inversion results from horizontal towed array
data are reported, and compared with independent estimates of
geoacoustic
bottom properties.