aperture area

См. также в других словарях:

• Aperture — For other uses, see Aperture (disambiguation). f stops demonstrated on a lens …   Wikipedia

• Aperture (mollusc) — The aperture is the main (or only) opening in the shell of a gastropod or snail. It is where the soft parts of the animal emerge. In some prosobranch gastropods, the aperture is able to be closed, and even completely sealed, with a sort of door… …   Wikipedia

• aperture plate — noun : a smooth plate that establishes the film plane in a motion picture camera or projector and that has a rectangular opening defining the margins of the picture area as recorded or projected …   Useful english dictionary

• aperture synthesis — noun : a technique in radio astronomy in which two or more radio telescopes are varied in position and spacing to simulate a large telescope having a collecting area with a diameter approximately equal to the largest spacing between the smaller… …   Useful english dictionary

• Antenna effective area — In telecommunication, antenna effective area or effective aperture is the functionally equivalent area from which an antenna directed toward the source of the received signal gathers or absorbs the energy of an incident electromagnetic wave. Note …   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

• Interferometric synthetic aperture radar — Interferometric synthetic aperture radar, also abbreviated InSAR or IfSAR, is a radar technique used in geodesy and remote sensing. This geodetic method uses two or more synthetic aperture radar (SAR) images to generate maps of surface… …   Wikipedia

• Antenna aperture — As a receiver, antenna aperture can be visualised as the area of a circle constructed broadside to incoming radiation where all radiation passing within the circle is delivered by the antenna to a matched load. (Note that transmitting and… …   Wikipedia

• Tactical Synthetic Aperture Radar — The Tactical Synthetic Aperture Radar (TSAR) is a new radar system introduced on the MQ 8B Fire Scout unmanned aerial vehicle. It delivers high resolution, wide area radar images day or night, and in all weather conditions. TSAR systems take… …   Wikipedia

• Selected area diffraction — Selected area (electron) diffraction, abbreviated as SAD (SAED), is a crystallographic experimental technique that can be performed inside a transmission electron microscope (TEM).In a TEM, a thin crystalline specimen is subjected to a parallel… …   Wikipedia

• Very-small-aperture terminal — A 2.5 m parabolic dish antenna for bidirectional satellite Internet access A very small aperture terminal (VSAT), is a two way satellite ground station or a stabilized maritime Vsat antenna with a dish antenna that is smaller than 3 meters. The… …   Wikipedia