Broadbeam multi-aspect synthetic aperture sonar

MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295) Pub Date : 2001-11-05 DOI:10.1109/OCEANS.2001.968709

D. A. Cook, T. James, Jose E. Fernandez

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引用次数: 17

Abstract

Broadband multi-aspect processing promises to improve the image quality and target detection/classification capabilities of imaging systems since the different aspects or 'looks' can provide additional clues about the shape and dimension of targets. To obtain high cross-range resolutions, these different 'looks' can be obtained by steering the main beam of a synthesized aperture. Synthetic aperture beam steering can be performed on data that was collected in stripmap mode. Accurate beam steering requires correct data handling by the reconstruction algorithm since the target area is in the near-field of the aperture. The limits of steering are determined primarily by the beamwidth of the system in question. The low-frequency synthetic aperture sonar system in use at the Coastal Systems Station in Panama City, Florida is well suited to this type of beam steering because of its broad beams (100/spl deg/ for the receiver and 50/spl deg/ for the transmitter) and its spatially oversampled design. Results obtained from simulated point targets as well as real data are presented.

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宽波束多向合成孔径声纳

宽带多面向处理有望提高成像系统的图像质量和目标检测/分类能力，因为不同的方面或“外观”可以提供关于目标形状和尺寸的额外线索。为了获得高的跨距离分辨率，这些不同的“外观”可以通过操纵合成孔径的主光束来获得。合成孔径光束导向可以对条带图模式下采集的数据进行处理。由于目标区域位于孔径的近场，因此精确的波束转向要求重构算法对数据进行正确处理。转向的限制主要由所讨论的系统的波束宽度决定。位于佛罗里达州巴拿马城的海岸系统站使用的低频合成孔径声纳系统非常适合这种类型的波束转向，因为它具有宽波束(接收器为100/spl度，发射机为50/spl度)和空间过采样设计。给出了模拟点目标和实际数据的结果。

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MTS/IEEE Oceans 2001. An Ocean Odyssey. Conference Proceedings (IEEE Cat. No.01CH37295)

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