Radar Definition–noun | 1. | Electronics. a device for determining the presence and location of an object by measuring the time for the echo of a radio wave to return from it and the direction from which it returns. |
| 2. | a means or sense of awareness or perception: lobbyists working under the media's radar. |
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From Dictionary
Related topics from Britannicaradar
electromagnetic sensor used for detecting, locating, tracking, and recognizing objects of various kinds at considerable distances. It operates by transmitting electromagnetic energy toward objects, ...
radio and radar astronomy
study of celestial bodies by examination of the radio-frequency energy they emit or reflect. Radio waves penetrate much of the gas and dust in space, as well as the clouds of planetary atmospheres, ...
warning system
Radar is used by ground forces for many purposes: in portable sizes, for infiltration detection; in intermediate sizes, for mortar and artillery shell tracking; and in large sizes, for early warning, ...
radar
The most common type of radar signal consists of a repetitive train of short-duration pulses. The shows a simple representation of a sine-wave pulse that might be generated by the transmitter of a ...
radar
Radar can distinguish one kind of target from another (such as a bird from an aircraft), and some systems are able to recognize specific classes of targets (for example, a commercial airliner as ...
telescope
Techniques analogous to those used in military and civilian radar applications are sometimes employed with radio telescopes to study the surface of planets and asteroids in the solar system. By ...
lighthouse
Radar-responder beacons are employed in other fields, such as aviation; in marine navigation they are called racons. A racon transmits only in response to an interrogation signal from a ship's radar, ...
weather forecasting
As in many fields of endeavour, weather prediction experienced several breakthroughs during and immediately after World War II. The British began using microwave radar in the late 1930s to monitor ...
radar
During the 1930s, efforts to use radio echoes for aircraft detection were initiated independently and almost simultaneously in eight countries that were concerned with the prevailing military ...
radar
Radar typically involves the radiating of a narrow beam of electromagnetic energy into space from an antenna (see the ). The narrow antenna beam scans a region where targets are expected. When a ...
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Related topics from Ask NewsNew radar installed to catch wanted vehicles
ArabianBusiness.com - Found 3 hours ago
... by This email address is being protected from spam bots, you need Javascript enabled to view it on Sunday, 19 October 2008 ROAD RADAR: New ...
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Eagles pop up on radar
Boston Herald - Found 13 hours ago
For the first six weeks of the season, Boston College has been sailing under the radar, even for the notoriously low-flying Eagles.
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'Hindu fascist forces on Maoist radar'
Orissa.net - Found 19 hours ago
Swami Lakshmanananda Saraswati could be that they wanted t send across a message to Hindu fundamentalist forces which are on their radar now.
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AirGrab unveils WiFi Radar network tool
MacNN | The Macintosh News Network - Found Oct. 17, 2008
AirGrab has unveiled WiFi Radar, a tool for the Mac that gathers network information.
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Political Radar: Joe The Plumber: Obama Tax Plan 'Infuriates Me'
Joe Publicus -- Best conservative blog for peace through bullets site - Found Oct. 16, 2008
"Political Radar: Joe The Plumber: Obama Tax Plan 'Infuriates Me' John McCain may have found a blue-collar face to help him argue that no ...
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Microsemi Announces Silicon Carbide RF Power Devices For VHF And UHF ...
UPDATE 1-Alcatel puts Thales stake sale on the radar
Radar Logic Launches Manhattan Neighborhood Home Price Indices
Jupiter effects radar integration for IAF
Business Standard India - Found Oct. 14, 2008
Jupiter, this system Integrates the radar pictures of the IAF, Navy and the civil radars in the Southern Peninsula through a multi-radar data...
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TV Review: Double dose is too much on our Radar
New Zealand Herald - Found Oct. 12, 2008
... superstar called Te Radar who's on TV each night? Te Radar has allegedly been leading a sustainable lifestyle in the unconvincing Off the Radar...
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