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A directed-energy weapon ( DEW) is a ranged weapon that damages its target with highly focused energy without a solid projectile, including lasers, microwaves, particle beams, and sound beams. Potential applications of this technology include weapons that target personnel, missiles, vehicles, and optical devices. [1] [2]
A radar speed gun, also known as a radar gun, speed gun, or speed trap gun, is a device used to measure the speed of moving objects. It is commonly used by police to check the speed of moving vehicles while conducting traffic enforcement, and in professional sports to measure speeds such as those of baseball pitches, [1] tennis serves, and ...
The RCA 474L Ballistic Missile Early Warning System ( BMEWS, 474L System, [17] Project 474L) was a United States Air Force Cold War early warning radar, computer, and communications system, [18] for ballistic missile detection. The network of twelve radars, [12] which was constructed beginning in 1958 and became operational in 1961, was built ...
Anti-satellite weapons (ASAT) are space weapons designed to incapacitate or destroy satellites for strategic or tactical purposes. Although no ASAT system has yet [update] been utilized in warfare , a few countries ( China , India , Russia , and the United States ) have successfully shot down their own satellites to demonstrate [2] their ASAT ...
The radar determines the direction because the short radio waves behave like a search light when emitted from the reflector of the radar set's antenna. Search RAF Boeing E-3 Sentry AEW1 with rotating radar dome. The dome is 30 feet across (9 m) The E-3 is accompanied by two Panavia Tornado F3.
Doppler effect. The emitted signal toward the car is reflected back with a variation of frequency that depends on the speed away/toward the radar (160 km/h). This is only a component of the real speed (170 km/h). The Doppler effect (or Doppler shift), named after Austrian physicist Christian Doppler who proposed it in 1842, is the difference ...
Radar is a system that uses radio waves to determine the distance ( ranging ), direction ( azimuth and elevation angles ), and radial velocity of objects relative to the site. It is a radiodetermination method [1] used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, map weather formations, and terrain.
Range. 5.0 mi (8 km) [1] British Army Air Corps AgustaWestland Apache Longbow displays at a UK airshow. The AN/APG-78 Longbow is a millimeter-wave fire-control radar (FCR) system for the AH-64D/E Apache attack helicopter. It was initially developed in the 1980s as the Airborne Adverse Weather Weapon System (AAWWS) as part of the Multi-Stage ...