System for Active Underwater Imaging Using Inverse Synthetic Aperture.
Patent Application, Filed 5 Jul 90,
DEPARTMENT OF THE NAVY WASHINGTON DC
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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
- Acoustic Detection and Detectors
- Hydrology, Limnology and Potamology