Synthetic Aperture Radar (SAR); a Form of Radar Used To Create 2D Images or 3D Reconstructions of Objects
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Synthetic Aperture Radar (SAR) |
Synthetic-aperture radar (SAR) is a form of radar that is used to create two-dimensional images or three-dimensional reconstructions of objects. It uses the motion of the radar antenna over a target area to provide better spatial resolution in comparison to conventional stationary beam-scanning radars. Synthetic aperture radar refers to a technology for producing fine-resolution images from a resolution-limited radar system. The SAR works on the principle of transmission and reception of reflected signals that interact with the ground and assist in imaging, tracking, identification, and characterization.
Synthetic aperture radar is a highly accurate and sensitive form of radar which is employed to make two-dimensional or three dimensional digital images or scans of objects. These new high-performance radars can be used for military tactical applications, vehicle tracking, air traffic control, and disaster recovery. It has the ability to scan larger areas and faster than a fixed radar mounted vehicle tracking system, making it an effective surveillance tool. SAR can be used in a variety of surveillance environments ranging from city streets to mountains and skies.]
The accuracy of synthetic-aperture radar has made it one of the most widely used surveillance technologies worldwide, in both the public and private sectors. These radars employ operating frequencies or microwave illuminators and this keeps the radar imaging unaffected even in bad weather conditions. Satellite-based synthetic-aperture radars (SARs) can transmit and receive images of various strategic areas during complete darkness or worst weather conditions and are the only resource available to various defense/aerospace agencies.
In February 2020, Japan Aerospace Exploration Agency (JAXA) and Alouette Technology Inc. developed an onboard image processor for synthetic aperture radar (SAR) data. It was expected to be applied to maritime observations and tracking of vessels, both of which are becoming increasingly important. Synthetic aperture radar (SAR) imaging, is a technique that allows us to remotely map the reflectivity of objects or environments with high spatial resolution, through the emission and reception of electromagnetic signals.
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