aperture of an array

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• Aperture synthesis — or synthesis imaging is a type of interferometry that mixes signals from a collection of telescopes to produce images having the same angular resolution as an instrument the size of the entire collection. At each separation and orientation, the… …   Wikipedia

• Aperture masking interferometry — is a form of speckle interferometry, allowing diffraction limited imaging from ground based telescopes. This technique allows ground based telescopes to reach the maximum possible resolution, allowing ground based telescopes with large diameters… …   Wikipedia

• Array of Low Energy X-ray Imaging Sensors — The Array of Low Energy X ray Imaging Sensors (ALEXIS) X ray telescopes feature curved mirrors whose multilayer coatings reflect and focus low energy X rays or extreme ultraviolet light the way optical telescopes focus visible light. The… …   Wikipedia

• Thinned array curse — The thinned array curse (sometimes, sparse array curse ) is a theorem in electromagnetic theory of transmitters. It states that a transmitting aperture which is synthesized by a coherent phased array of smaller apertures that are spaced apart… …   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

• Phased array — This article is about general theory and electromagnetic phased array. For the ultrasonic and medical imaging application, see phased array ultrasonics. In wave theory, a phased array is a group of antennas in which the relative phases of the… …   Wikipedia

• Synthetic Aperture Radar — Radaraufnahme (SIR C/X SAR) des Vulkans Teide auf Teneriffa aus dem Space Shuttle Endeavour Ein Synthetic Aperture Radar (Abkürzung: SAR; deutsch etwa: „Radar mit synthetischer Apertur“) gehört zur Klasse der abbildenden Radare und wird als… …   Deutsch Wikipedia

• Allen Telescope Array — For other uses, see ATA. Allen Telescope Array ATA The Allen Telescope Array (ATA 42), October 11, 2007 …   Wikipedia

• Square Kilometre Array — The Square Kilometre Array (SKA) is a radio telescope in development which will have a total collecting area of approximately one square kilometre. [ [http://www.skatelescope.org/ Square Kilometre Array] website.] It will operate over a wide… …   Wikipedia

• Synthetic aperture radar — (SAR) is a form of radar in which the highly directional (and thus very large) rotating antenna used by conventional radar is replaced with many low directivity small stationary antenna positions scattered over some area near or around the target …   Wikipedia

• Atacama Large Millimeter Array — Atacama Large Millimeter/submillimeter Array ALMA logo Organisation Multi national Location Llano …   Wikipedia