Title :
Time exposure acoustics
Author :
Norton, Stephen J. ; Won, I.J.
Author_Institution :
Geophex Ltd., Rayleigh, NC, USA
fDate :
5/1/2000 12:00:00 AM
Abstract :
An analysis of a passive seismic method for subsurface imaging is presented, in which ambient seismic noise is employed as the source of illumination of underground scatterers. The imaging algorithm can incorporate new data into the image in a recursive fashion, which causes image background noise to diminish over time. Under the assumption of spatially-incoherent ambient noise, an analytical expression for the point-spread function of the imaging algorithm is derived. The point-spread function (PDF) characterizes the resolution of the image, which is a function of the receiving array length and the ambient noise bandwidth. Results of a Monte Carlo simulation are presented to illustrate the theory
Keywords :
Monte Carlo methods; acoustic arrays; acoustic tomography; array signal processing; geophysical signal processing; image resolution; noise; seismology; Monte Carlo simulation; ambient noise bandwidth; image background noise; imaging algorithm; passive seismic method; point-spread function; receiving array length; resolution; seismic noise; spatially-incoherent ambient noise; subsurface imaging; time exposure acoustics; underground scatterers; Acoustic imaging; Acoustic noise; Acoustic scattering; Background noise; Image analysis; Light scattering; Lighting; Sea surface; Signal processing algorithms; Surface acoustic waves;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
