RADAR
Ø
Radar is an object-detection system that uses
radio waves to determine the range, altitude, direction, or speed of objects.
It can be used to detect aircraft, ships, spacecraft, guided missiles, motor
vehicles, weather formations, and terrain. The radar dish or antenna transmits
pulses of radio waves or microwaves that bounce off any object in their path.
The object returns a tiny part of the wave's energy to a dish or antenna that
is usually located at the same site as the transmitter.
Ø Radar was secretly developed by several nations
before and during World War II. The term RADAR was coined in 1940 by the United
States Navy as an acronym for RAdio Detection And Ranging. The term radar has since entered English and other
languages as a common noun, losing all capitalization.
Ø
The modern uses of radar are highly diverse,
including air traffic control, radar astronomy, air-defense systems,
antimissile systems; marine radars to locate landmarks and other ships;
aircraft anticollision systems; ocean surveillance systems, outer space
surveillance and rendezvous systems; meteorological precipitation monitoring;
altimetry and flight control systems; guided missile target locating systems;
and ground-penetrating radar for geological observations. High tech radar systems
are associated with digital signal processing and are capable of extracting
useful information from very high noise levels.
Comments
Post a Comment