sonar resolution

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• Sonar — This article is about underwater sound propagation. For atmospheric sounding, see SODAR. For other uses, see Sonar (disambiguation) …   Wikipedia

• Synthetic aperture sonar — (SAS) is a form of sonar in which sophisticated post processing of sonar data are 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… …   Wikipedia

• Side-scan sonar — (also sometimes called side scan sonar, sidescan sonar, side looking sonar, side looking sonar and bottom classification sonar) is a category of sonar system that is used to create efficiently an image of large areas of the sea floor. This tool… …   Wikipedia

• Diver Detection Sonar — (DDS) systems are sonar and acoustic location systems employed underwater for the detection of divers and submerged swimmer delivery vehicles (SDVs). The purpose of this type of sonar system is to provide detection, tracking and classification… …   Wikipedia

• Towed array sonar — A towed array sonar is a sonar array that is towed behind a submarine or surface ship. It is basically a long cable, up to 2000 m, with hydrophones that is trailed behind the ship when deployed.Fact|date=March 2008 The hydrophones are placed at… …   Wikipedia

• Tonkin-Resolution — US Präsident Lyndon B. Johnson unterschreibt die Tonkin Resolution …   Deutsch Wikipedia

• warning system — ▪ military technology Introduction       in military science, any method used to detect the situation or intention of an enemy so that warning can be given.       Because military tactics from time immemorial have stressed the value of surprise… …   Universalium

• Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry       The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …   Universalium

• Geophysical MASINT — is a branch of Measurement and Signature Intelligence (MASINT) that involves phenomena transmitted through the earth (ground, water, atmosphere) and manmade structures including emitted or reflected sounds, pressure waves, vibrations, and… …   Wikipedia

• Sediment Profile Imagery — (SPI) is an underwater technique for photographing the interface between the seabed and the overlying water. The technique is used to measure or estimate biological, chemical, and physical processes occurring in the first few centimetres of… …   Wikipedia

• Radar — Pour les articles homonymes, voir Radar (homonymie). Cette antenne radar longue portée, connue sous le nom ALTAIR, est utilisée pour détecter et pister les objets spatiaux en conjonction avec le système anti …   Wikipédia en Français