Definitions of RADAR on the Web:
An instrument used to detect precipitation by measuring the strength of the electromagnetic signal reflected back. RADAR = RAdio Detection And Ranging.
Radio Detection And Range See also: MTI, ATC, VTS, VTMSAcronym for RAdio Detection And Ranging. Radio waves are bounced off an object, and the time at which the echo is received indicates its distance.a method of estimating the distance or travel speed of an object by bouncing high frequency signals off the object and measuring the reflected signal.A system of detecting and locating targets which are capable of reflecting high frequency radio waves (microwaves), generally in the wavelength range from a fraction of a centimetre to some tens of centimetres. Radar is used in meteorology to detect and measure cloud and precipitaion elements. Radar images are regularly used in television weather broadcasts to show the movement of rain bearing cloud formations across the country.
An instrument useful for remote sensing of meteorological phenomena. It operates by sending radio waves and monitoring those returned by such reflecting objects as raindrops within clouds.
Short for "radio detection and ranging," radar sends out short pulses of microwave energy and records the returned signal's strength and time of arrival.an electronic radio detection and ranging system that determined the location, speed, and number of water vessels and/or the azimuth, location, height, speed, and number of aircraft. RA in RAdio, D in Detection, A in And, and R in Ranging.
an electronic instrument that broadcasts and receives microwave signals back from precipitation areas, and determines their location, height, movement, and intensity. rainbow: an arc displaying all colors in the visible light spectrum. Formed when light from the sun is reflected and refracted through water droplets. Always appears on the side of the sky opposite of the sun. ...
A technology used in earth observation that uses microwaves instead of light energy. Whereas optical sensors are passive (rely on the sun's energy to shine on an object in order to detect it), radar detectors are usually active in that they first emit a pulse of microwaves. This microwave energy travels to the surface of the earth and the reflected energy is detected by the sensor (a bit like flash photography). ...
(Radio Detecting and Ranging) - an electronic means of determining distance (not an acoustic means).
radio detecting and ranging; a device used to detect and determine the range to distant objects (eg, hydrometeors) or atmospheric discontinuities by measuring the time for the echo of a radio wave to return from it and the direction from which it returns.
ray-dar i) A system for detecting the direction, range, or prescence of aircraft, ships, and other (usu. moving) objects, by sending out pulses of high frequency electromagnetic waves, ii) the apparatus used for this.Beamed radio waves for detecting and locating objects. The objects are "seen" on the radar screen or scope.A technology used to locate objects by bouncing radio waves at them and observing the returning reflected patterA system using pulsed radio waves to detect the position of objects by measuring the time it takes a single pulse to reach the object and be reflected back.
is of two types, X band and S band. The ship's radar scans the sea only for about 1 and 1/2 vertical degrees in all directions. Modern radar can plot the the course and speed of any ship within range simply by a couple clicks of the mouse (actually track ball). This makes life a heck of a lot easier for the bridge officer
An electronic instrument used to detect objects (such as falling precipitation) by their ability to reflect and scattered microwaves back to a receiver. In Southern Colorado, the National Weather Service operates a radar system (called Nexrad, Doppler, or the WSR-88D) in extreme Northeastern Pueblo County. It is the most powerful and accurate radar in the region.
Measures audience estimates, total radio usage, network radio commercials and network commercials within radio programs. Estimates are based upon daily telephone interviews over a week. RADAR measures listenership for person twelve years of age or older and is published twice a year.
a device for radio detection and ranging. Radar measures the time interval between transmitted and received radio pulses and provides information on the range, azimuth, and/or elevation of objects in the path of the transmitted pulse. A primary radar system uses reflected radio signals. A secondary radar system is a system wherein a radio signal that is transmitted from a radar station initiates the transmission of a radio signal from another station
Radio detection and ranging. An electronic instrument that uses radio waves to find the distance and location of other objects. Used to avoid collisions, particularly in times of poor visibility.(acronym for Radio Detection And Ranging) an electronic instrument that broadcasts and receives microwave signals back from targets to determine location.Stands for "radio detection and ranging." An instrument that detects and ranges distant objects by measuring the scattering and reflection of radio beams. Radiation- The transferring of energy through electromagnetic waves. Rain- Liquid precipitation with drops larger than .02 inches in diameter. Rainbow- An arc or circle of colored light caused by the refraction of light by water droplets in the air. ...
Acronym for Radio Detection and Ranging. A method, a system, or a technique for using beam, reflected, and timed electromagnetic radiation to detect, locate, and track objects, to measure distance (altitude), and to acquire terrain imagery. The term 'radar' in remote sensing terminology refers to active microwave systems (from about 1 GHz - 100 GHz; the majority of current instruments operate below 10 GHz).RAdio Direction and RAnging, has a long history in the development of radio communication and was applied most successfully by the British during the Second World War as part to their coastal defence system. Click here to learn more.
measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects
RADAR is an acronym for RAdio Detection And Ranging or Radio Angle Detection And Ranging. It is a system used to detect, range (determine the distance of), and map objects such as aircraft and rain. Strong radio waves are transmitted, and a receiver listens for any echoes. By analysing the reflected signal, the reflector can be located, and sometimes identified. Although the amount of signal returned is tiny, radio signals can easily be detected and amplified.