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"LMRS may refer to: * Long-Term Mine Reconnaissance System * Land Mobile Radio Service "
"The AN/BLQ-11 autonomous unmanned undersea vehicle (formerly the Long- Term Mine Reconnaissance System (LMRS)) is a torpedo tube-launched and tube- recovered underwater search and survey unmanned undersea vehicle (UUV) capable of performing autonomous minefield reconnaissance as much as in advance of a host -, -, or -class submarine. LMRS is equipped with both forward-looking sonar and side-scan synthetic aperture sonar. Boeing concluded the detailed design phase of the development project on 31 August 1999. In January 2006, successfully demonstrated homing and docking of an LMRS UUV system during at- sea testing. Citations Sources *http://auvac.org/platforms/view/128 Category:Equipment of the United States Navy Category:Autonomous underwater vehicles "
"West Ridge Synthetic aperture sonar (SAS) is a form of sonar 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 R. E. Hansen, Synthetic Aperture Sonar Technology Review, Marine Technology Society Journal, Volume 47, Number 5, September/October 2013, pp. 117-127 with examples and future trends is also available. For academics, the IEEE Journal of Oceanic Engineering article: Synthetic Aperture Sonar, A Review of Current StatusM. 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. gives an overview of the history and an extensive list of references for the community achievements up to 2009. See also * beamforming * phased array * side-scan sonar * sonar * underwater acoustics 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 Category:Sonar Category:Synthetic aperture radar "