Accession Number : ADD014652

Title :   System for Active Underwater Imaging Using Inverse Synthetic Aperture.

Descriptive Note : Patent Application, Filed 5 Jul 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Griffin, Maurice

Report Date : 05 Jul 1990

Pagination or Media Count : 15

Abstract : This invention relates to an underwater acoustic imaging system for use in controlled environments such as acoustic test facilities. More specifically it employs a single fixed hydrophone receiver location and a rotated target to greatly reduce the amount of acquisition hardware required and can satisfy the fractional wavelength phase coherence requirements for imaging. Since the same test setup, and in many cases even the identical data set, can be used for other test purposes such as target strength measurements, the images cn be used to help locate major contributors to target strength, and to indicate the position of the object relative to the data set used for the target strength measurements. Keywords: Patent applications, Acoustic reflection, Hydrophones. (KR)

Descriptors :   *ACOUSTIC IMAGES, *PATENT APPLICATIONS, *UNDERWATER ACOUSTICS, ACOUSTIC REFLECTION, ACOUSTICS, ACQUISITION, CONTROLLED ATMOSPHERES, DATA BASES, HYDROPHONES, INVERSION, MEASUREMENT, SYNTHETIC APERTURE SONAR, TARGET STRENGTH, TEST FACILITIES, UNDERWATER, INVENTIONS

Subject Categories : Acoustic Detection and Detectors
      Acoustics
      Hydrology, Limnology and Potamology

Distribution Statement : APPROVED FOR PUBLIC RELEASE