Airborne synthetic aperture acoustic imaging

Author

Soumekh, Mehrdad

Author_Institution

Lincoln Lab., MIT, Lexington, MA, USA

Volume

6

Issue

11

fYear

1997

fDate

11/1/1997 12:00:00 AM

Firstpage

1545

Lastpage

1554

Abstract

This paper presents a system model and inversion for airborne synthetic aperture acoustic (SAA) imaging. The system model accurately represents the intercation of the acoustic source and the target region at near range values. Moreover, the model incorporates the fact that the relative speed of the vehicle´s (transmitter/receiver) with respect to the target region is comparable to the acoustic wave propagation speed. The inversion utilizes the principle of spectral decomposition of spherical phase functions to develop a wavefront reconstruction method from SAA data. Processing issues and selection of appropriate acoustic FM-CW sources are discussed. Results are provided that exhibit the superior accuracy of the proposed SAA system model and inversion over their synthetic aperture radar (SAR) counterpart in which the vehicle´s speed is assumed to be much smaller than the wave propagation speed

Keywords

acoustic imaging; acoustic wave propagation; aircraft instrumentation; frequency modulation; image reconstruction; inverse problems; spectral analysis; SAR; accuracy; acoustic FM-CW sources; acoustic source; acoustic wave propagation speed; airborne synthetic aperture acoustic imaging; aircraft; inversion; near range values; relative speed; spectral decomposition; spherical phase functions; synthetic aperture radar; system model; target region; transmitter/receiver; vehicle; wavefront reconstruction method; Acoustic imaging; Acoustic propagation; Acoustic signal detection; Acoustic waves; Doppler shift; Frequency; Power system modeling; Reconstruction algorithms; Synthetic aperture radar; Transmitters;

fLanguage

English

Journal_Title

Image Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7149

Type

jour

DOI

10.1109/83.641414

Filename

641414