Synthetic-aperture radar (SAR

May 13th, 2015
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• Synthetic-aperture radar (SAR) is a form of radar whose defining characteristic is its use of relative motion, between an antenna and its target region, to provide distinctive long-term coherent-signal variations, that are exploited to obtain finer spatial resolution than is possible with conventional beam scanning means

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Nikko And Rue S AS220 Presentation 1SARByRue Kindred&Nikko MunaoWhat Is SAR Synthetic-aperture radar (SAR) is a form of radarwhose defining characteristic is its use of relativemotion, between an antenna and its target region, toprovide distinctive long-term coherent-signalvariations, that are exploited to obtain finer spatialresolution than is possible with conventional beamscanning means. SAR originated as an advanced form of side-lookingairborne radar (SLAR).SAR SAR is usually implemented by mounting, on a moving platform such asan aircraft or spacecraft, a single beam-forming antenna from which a target scene is repeatedly illuminated with pulses of radio waves at wavelengths anywhere from a meter down to millimeters.The many echo waveforms received successively at the different antenna positions are:coherently detectedstoredthen post-processed together to resolve elements in an image of the target regionWhat Do We Use SAR For? SAR images have wide applications in remote sensing and mapping of the surfaces of both the Earth and other planets. SAR can also be implemented as "inverse SAR" by observing a moving target over a substantial time with a stationary antenna. Environmental monitoring, earth-resource mapping, and military systems require broad-area imaging at high resolutions. Many times the imagery must be acquired in inclement weather or during night as well as day. Synthetic Aperture Radar (SAR) pr

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