A device which measures the time interval between transmission and reception of radio pulses and correlating the angular orientation of the radiated antenna beam(s),in azimuth and/or elevation of objects in the path of the transmitted pulses.
An instrument useful for remote sensing of meteorological phenomena. It operates by sending radio waves and monitoring those returned by reflecting objects such as raindrops, cloud droplets, dust particles, blowing dirt and sand grains, or birds. When the reflecting particles are raindrops, the higher the energy returned to the radar, the larger the drops and the heavier the rainfall.
A radio detection device that provides information on range, azimuth or elevation of objects. There are two types of radar: primary surveillance radar (PSR) and secondary surveillance radar (SSR). see also: primary surveillance radar (PSR) and secondary surveillance radar (SSR) Fr: radar
Writing in 1919, ERB gives a prediction concerning the development of radar: "About 1940 had come the perfection of an instrument which accurately indicated direction and the distance of the focus of any radioactivity with which it might be attuned." (Observation supplied by Forrest J. Ackerman.) [MMa
a device used to detect the position of objects by measuring the echo of radio signals beamed at them
A rating service that surveys network radio audiences.
An instrument for determining the distance and direction to an object by measuring the time needed for radio signals to travel from the instrument to the object and back, and by measuring the angle through which the instrument's antenna has traveled.
The use of reflected radio waves to determine the location of an object and its speed if it is moving. For more information see How radar works (How Stuff Works, USA).
Ra dio etection nd anging. Primarily used by police for speed limit enforcement. Used aboard aircraft for terrain mapping, weather avoidance and navigation. Used by ATC for weather detection and for positive tracking and control of aircraft.
Ra dio etection nd anging. An electronic instrument used to detect precipitation by the ability of rain droplets (and other hydrometeors) to reflect microwaves (radio waves) back to a receiver. Read more about radar and the Australian Radar network here.
an instrument used by planes and ships to find solid objects by reflecting radio waves off them and by receiving the reflected waves.
A way to find or track objects using radio waves. An instrument sends out radio wave signals. The signals reflect off of the object and bounce back to the instrument, which uses the signals to locate the object.
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.
An acronym for radio range and detecting. A radio detection device that uses pulses of microwave-length energy to provide range, azimuth, and/or elevation data of objects.
( Ra dio etecting nd anging) - an electronic means of determining distance (not an acoustic means).
measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects
an electronic system used to detect, range (determine the distance of), and map various types of targets
(radio direction and ranging)
A 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.
The technique of transmitting radio waves to an object and then detecting the radiation that the object reflects back to the transmitter; used to measure the distance to, and motion of, a target object.
ra dio etection and anging) An electronic instrument that broadcasts a microwave electromagnetic radiation signal and receives the reflected portion of this signal from a target. In meteorology, the signal from a weather radar unit is reflected and scattered from precipitation particles (rain, hail, snow) to determine the location, height and intensity of precipitation areas; comparison of multiple radar echoes permits determination of changes in intensity and the speed and direction of the areal movement. See also Doppler radar .
A system of detection and location of 'targets' which are capable of reflecting high-frequency radio waves (microwaves), generally in the wave length range from a fraction of a centimeter to some tens of centimeters.
A modern electronic instrument that can measure distance using radio waves, or detect objects at a distance.
a method of detecting the distance, size, and movement of objects by their reflection of radio waves.
An instrument for measuring precipitation within clouds by the signal being bounced back.
A radio device for detecting the position of distant masses and the course of moving objects.
An electronic instrument used to detect objects (such as falling precipitation) by their ability to reflect and scattered microwaves back to a receiver. In Colorado, the National Weather Service operates a radar systems called Nexrad, Doppler, or the WSR-88D). It is the most powerful and accurate radar in the region.
RAdio Detection And Ranging. A method, system or technique, including equipment components, for using beamed, reflected, and timed electromagnetic radiation to detect, locate and (or) track objects, to measure altitude and to acquire a terrain image. In remote sensing of the Earth's or a planetary surface, it is used for measuring and, often, mapping the scattering properties of the surface.
stands for "Radio Detection and Ranging"; an electronic equipment that uses radio pulse to determine the bearing and distance to objects
(acronym for Radio Detection And Ranging) an electronic instrument that broadcasts and receives microwave signals back from targets to determine location.
Device or system consisting usually of a synchronized radio transmitter and receiver that emits radio waves and processes their reflections for display.
The acronym for radio detection and ranging; an active rather than passive radio technique in which radio signals are transmitted and their reflections received and studied.
Acronym for Radio Detection And Ranging. Radio waves are bounced off an object, and the time at which the echo is received indicates its distance.
System or technique for detecting the position, motion, and nature of a remote object by means of radio waves reflected from its surface.
A method of detecting distant objects and dterming their positionm velocity, or other characteristics by analysis of vrey high frequency radio waves reflected from their surfaces.
An instrument used to detect precipitation by measuring the strength of the electromagnetic signal reflected back. RADAR = RA dio etection nd anging.
An acronym for Radio detection and ranging.
Radio Direction And Ranging, a conical beam of pulsed electromagnetic energy in the microwave range transmitted outward from a rotating antenna. Backscattered energy from hydrometeors and other atmospheric scatterers, is collected by the same antenna and displayed either as a horizontal Plan Position Indicator (PPI) plot, or a vertical Range Height Indicator (RHI) slice. Some radar display systems also have the capacity to integrate volumetric data collected from several scans at different beam elevations. One such method is to display a Constant Altitude PPI (CAPPI).
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.
RAdio Detection And Ranging. This is refers an electronic instrument that detects distant objects and measures their range by how they alter or reflect radio energy.
A wireless system which uses reflected RF energy to detect an object's range, location, and velocity.
Acronym for "radio detection and ranging" A system that measures the distance and direction of objects.
RADAR stands for RA dio etecting nd anging.
"Radio Detection and Ranging." Active sensors that use microwave radiation.
acronym for RA dio etection nd anging; a radio device or system for locating an object by means of ultrahigh-frequency radio waves reflected from the object and received, observed, and analyzed by the receiving part of the device in such a way that characteristics (as distance and direction) of the object may be determined
A way of sending out radio waves out to find out about a distant object, such as where it is, how large it is and how fast it is moving.
Acronym for Ra dio etection nd anging; an instrument using beamed and timed electro-magnetic radiation to detect or track objects, measure height or obtain an image of the surface.
Stands for "radio detection and ranging." An instrument that detects and ranges distant objects by measuring the scattering and reflection of radio beams.
radio waves used to find distances to and make maps of things.
Electronic device using high frequency radio waves to detect objects and display their positions on a monitor.
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.
RAdio Detection AND Ranging. The use of microwaves to transmit and receive information.
An instrument used to detect precipitation by measuring the strength of the electromagnetic signal reflected back. (RADAR= Radio Detection and Ranging)
Acronym for Radio Detection and Ranging. Active microwave systems emitting radiation with wavelengths in the range of 1 millimeter to 1 meter.
Use of radio waves to provide information about objects on or above the surface of water; RAdio Direction And Range.
An electronic instrument used to detect objects (such as water droplets) by their ability to reflect and scatter microwaves back to a receiver.
Radio Detecting and Ranging
Radio method of determining at a single station by the direction and distance of an object. The distance is determined by the time taken by signals emitted by the station to reach a distant object and return. The term "radar" is derived from "Radio Detection and Ranging."
Radar is a method of detecting distant objects and determining their position, velocity, or other characteristics by analysis of very high frequency radio waves reflected from their surfaces. Radar also refers to the equipment used in such detecting.
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.
a system that locates distant objects by sending out radio waves and detecting them when they bounce back off the objects
Antennae designed to transmit and receive electromagnetic waves so as to interrogate a spatial area (range) of interest.
RAdio Detection And Ranging more
A system whereby short electromagnetic waves are transmitted and any energy which is scattered back by reflecting objects is detected. Acronym for radio detection and ranging.
Stands for Radio Detection and Ranging. RADAR is a tool used to see objects that are far away and measure how they spread out to reflect radio energy.
Beamed radio waves for detecting and locating objects. The objects are "seen" on the radar screen or scope.
A system used to trace moving ships or aircraft. In wartime, radar warns of an approaching attack by the enemy. Britain used radar in the Second World War to detect approaching German aircraft. Fighter planes were then sent up to attack the German planes as they flew in over the coast of Britain. Radar was still new at this time, and work was going on to improve it
An electronic instrument using ultra high-frequency radio waves to detect distant objects and measure their range by how they scatter or reflect radio energy. Precipitation and clouds are detected by measuring the strength of the electromagnetic signal reflected back. Doppler radar and NEXRAD are examples
An acronym for ra dio etection and anging; a method of determining the distance of an object by transmitting a radio signal and measuring its echo (or reflection) from the object.
A method of detecting, locating, or tracking an object by using beamed, reflected, and timed radio waves. RADAR also refers to the electronic equipment that uses radio waves to detect, locate, and track objects.
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.
RAdio Detection And Ranging was an original active microwave sensor that became widely operational with the onset of World War II.
Acronym for RAdio Detection And Ranging. An electronic instrument used to detect distant objects and measure their range by how they scatter or reflect radio energy. Precipitation and clouds are detected by measuring the strength of the electromagnetic signal reflected back.
Radar is a system that uses radio waves to determine and map the location, direction, and/or speed of both moving and fixed objects such as aircraft, ships, motor vehicles, weather formations and terrain. A transmitter emits radio waves, which are reflected by the target and detected by a receiver, typically in the same location as the transmitter. Although the radio signal returned is usually very weak, radio signals can easily be amplified, so radar can detect objects at ranges where other emissions, such as sound or visible light, would be too weak to detect.
