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Constant false alarm rate (CFAR) detection is a common form of adaptive algorithm used in radar systems to detect target returns against a background of noise, clutter and interference. [ 1 ] Principle
Passive radar (also referred to as parasitic radar, passive coherent location, passive surveillance, and passive covert radar) is a class of radar systems that detect and track objects by processing reflections from non-cooperative sources of illumination in the environment, such as commercial broadcast and communications signals.
Automatic target recognition (ATR) is the ability for an algorithm or device to recognize targets or other objects based on data obtained from sensors.. Target recognition was initially done by using an audible representation of the received signal, where a trained operator who would decipher that sound to classify the target illuminated by the radar.
If you want to take a closer look at nature's wonders, you've come to the right place!Ian Granström, a photographer from Southern Finland, captures intimate wildlife images of foxes, birds, elk ...
Dozens of out-of-town vultures have been busted for sneaking into ritzy neighborhoods in the Los Angeles wildfire evacuation zone to loot abandoned homes — and local police are naming and ...
John Daly is on the mend after receiving emergency hand surgery. On Tuesday, Jan. 14, the golfer, 58, shared a photo of himself on his Instagram Stories lying in a hospital bed, giving a thumbs-up ...
The system was retained on several submarines transferred by the US to foreign navies. It was associated with long-range passive detection of targets for the Mark 45 nuclear torpedo and other weapons. Most submarines backfitted with it were also lengthened 12–16 feet (3.7–4.9 m) to accommodate additional electronics and plotting rooms.
However, sonar images often lack proper contrast [clarification needed] and are degraded by artefacts and distortions due to noise, attitude changes of the AUV/ROV carrying the sonar or non uniform beam patterns. Another common problem with sonar computer vision is the comparatively low frame rate of sonar images.