synthetic aperture


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synthetic aperture

[sin′thed·ik ′ap·ə·chər]
(engineering)
A method of increasing the ability of an imaging system, such as radar or acoustical holography, to resolve small details of an object, in which a receiver of large size (or aperture) is in effect synthesized by the motion of a smaller receiver and the proper correlation of the detected signals.
References in periodicals archive ?
Exploring in detail the physics and technology necessary to analyze and understand meter-wave synthetic aperture radar and its applications, Hellsten focuses on targets screened by forests or underground, for which the experimental data and theoretical development are more advanced than for building penetration and ground topography.
The antenna reflector, furnished by Astro Aerospace, is part of the NISAR L-band synthetic aperture radar managed by NASA's Jet Propulsion Laboratory.
Here, a brief analysis of near-field synthetic aperture imaging model based on "T" antenna array is demonstrated.
When synthetic aperture techniques are applied at sufficiently low acoustic frequencies, where sound absorption in the ocean medium is minimized, a modest-sized side-scan sonar can generate imagery with a constant azimuth resolution comparable to that of higher frequency sonar systems, but with a longer range potential, as shown in Figure 1.
Desert Storm underscored the reality that the synthetic aperture radar has become indispensable to military operations because of the clarity of the image that it provides, its day and night application and resistance to interference from bad weather.
A similar technique, called synthetic aperture radar, has long been used to construct 3-D landscapes from radio waves emitted by an airplane or satellite and reflected by the ground back to the craft.
How about synthetic aperture radar or inverse synthetic aperture radar, technologies that have opened up exciting possibilities for overcoming the ill effects of atmospheric disturbances and poor visibility?
Current and future missions depend heavily on the aircraft's ability to find and track targets, so this modification to the synthetic aperture radar is critical.
The MQ-9 will provide a hunter-killer capability and will feature the ability to use synthetic aperture radar to hunt for targets," Severyn said.
The SSU enhanced the ability of the S-3Bs' APS-137 synthetic aperture radar to accurately track surface targets.
Their joint initiative involves the matching of multiple radar images of the same site, acquired using instruments such as the synthetic aperture radar aboard ESA's ERS satellite, so that tiny movements are highlighted.
EADS Astrium has recently completed trials of its Airborne Synthetic Aperture Radar (SAR), called the MicroSAR Airborne Demonstrator.

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