HOME

TheInfoList



Click Here for Items Related To - Synthetic aperture sonar
OR:
Synthetic aperture sonar on:   [Wikipedia]   [Google]   [Amazon]

Synthetic aperture sonar (SAS) is a form of
sonar Sonar (sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances (ranging), communicate with or detect objects on o ...
in which sophisticated post-processing of sonar data is used in ways closely analogous to synthetic aperture radar. Synthetic aperture sonars combine a number of acoustic pings to form an image with much higher along-track resolution than conventional sonars. The along-track resolution can approach half the length of one sonar element, though is downward limited by 1/4 wavelength. The principle of synthetic aperture sonar is to move the sonar while illuminating the same spot on the sea floor with several pings. When moving along a straight line, those pings that have the image position within the beamwidth constitute the synthetic array. By coherent reorganization of the data from all the pings, a synthetic aperture image is produced with improved along-track resolution. In contrast to conventional side-scan sonar, SAS processing provides range-independent along-track resolution. At maximum range the resolution can be magnitudes better than that of side-scan sonars. A 2013 technology review with examples and future trends is also available. For academics, the IEEE Journal of Oceanic Engineering article: ''Synthetic Aperture Sonar, A Review of Current Status''M. P. Hayes and P. T. Gough, ''Synthetic Aperture Sonar: A Review of Current Status'', IEEE J. Ocean. Eng., vol. 34, no. 3, pp. 207-224, July 2009
Access abstract.
/ref> gives an overview of the history and an extensive list of references for the community achievements up to 2009.


See also

* beamforming *
phased array In antenna theory, a phased array usually means an electronically scanned array, a computer-controlled array of antennas which creates a beam of radio waves that can be electronically steered to point in different directions without moving th ...
*
side-scan sonar Side-scan sonar (also sometimes called side scan sonar, sidescan sonar, side imaging sonar, side-imaging sonar and bottom classification sonar) is a category of sonar system that is used to efficiently create an image of large areas of the se ...
*
sonar Sonar (sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances (ranging), communicate with or detect objects on o ...
*
underwater acoustics Underwater acoustics is the study of the propagation of sound in water and the interaction of the mechanical waves that constitute sound with the water, its contents and its boundaries. The water may be in the ocean, a lake, a river or a tank. Ty ...


References


External links


KRAKEN MINSAS for AUV's

KRAKEN INSAS for AUV's

KRAKEN Actively Stabilized SAS Towfish - KATFISH

iXBlue - SAMS-DT6000

Kongsberg - Hisas

Raytheon Applied Signal Technology - HD Sonar
Sonar Synthetic aperture radar {{Navy-stub