Title :
Geoacoustic inversion using a rotated coordinate system and simulated annealing
Author :
Fialkowski, Laurie T. ; Lingevitch, Joseph F. ; Perkins, John S. ; Dacol, Dalcio K. ; Collins, Michael D.
Author_Institution :
Naval Res. Lab., Washington, DC, USA
fDate :
7/1/2003 12:00:00 AM
Abstract :
An efficient method for geoacoustic inversions in a range-dependent ocean waveguide is implemented and tested with synthetic data. This method combines a simulated annealing search with an optimal coordinate rotation that increases the efficiency of navigating parameter landscapes for which parameter coupling is important. The coordinate rotation associated with the parameter couplings also provides information about which parameters are resolvable for a particular inversion frequency and array geometry. Using this information, results from several single-frequency inversions can be combined to obtain an estimate for the sediment parameters.
Keywords :
acoustic measurement; acoustic waveguides; gradient methods; inverse problems; oceanographic techniques; simulated annealing; underwater sound; array geometry; geoacoustic inverse problems; geoacoustic inversion; gradient methods; inversion frequency; optimal coordinate rotation; optimization methods; parameter coupling; parameter landscape navigation; range-dependent ocean waveguide; rotated coordinate system; sediment parameters; simulated annealing; single-frequency inversions; underwater acoustics; Cost function; Equations; Frequency estimation; Geoacoustic inversion; Inverse problems; Navigation; Oceans; Optimization methods; Sediments; Simulated annealing;
Journal_Title :
Oceanic Engineering, IEEE Journal of
DOI :
10.1109/JOE.2003.816686
