what radar mean
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Definitions &Translations Radar is an object detection system which 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.
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- If you shout hello, the sound may bounce back at you from a large object. You then hear your own voice coming back. Your returning voice is called an echo. Radar and sonar are electronic devices that use the principle of an echo to detect and locate objects. Both radar and sonar locate objects from the echo of a signal that is bounced off the object. Radar uses radio waves, which are a type of electromagnetic energy. Sonar uses the echo principle by sending out sound waves underwater or through the human body to locate objects. Sound waves are a type of acoustic energy. Because of the different type of energy used in radar and sonar, each has its own applications.
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Measuring Precipitation Current Radar. The Current Radar map shows areas of current precipitation. A weather radar is used to locate precipitation, calculate its motion, estimate its type (rain, snow, hail, etc.), and forecast its future position and intensity. Modern weather radars are mostly doppler radars, capable of detecting the motion of rain droplets in addition to intensity of the precipitation.
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Weather radar Modern weather radars are mostly doppler radars, capable of detecting the motion of rain droplets in addition to intensity of the precipitation. Both types of data can be analyzed to determine the structure of storms and their potential to cause severe weather.
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- radar absorbing material that has imaginary components of permittivity and/or permeability (ie the electric or magnetic fields of the radiation couple with the material properties and energy is consumed). In this section the field of microwave (radar) absorbing materials (RAM) is reviewed
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- Both radar and sonar locate objects from the echo of a signal that is bounced off the object. Radar uses radio waves, which are a type of electromagnetic energy. Sonar uses the echo principle by sending out sound waves underwater or through the human body to locate objects. Sound waves are a type of acoustic energy. Because of the different type of energy used in radar and sonar, each has its own applications.
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Doppler effect The Doppler effect is used in some types of radar, to measure the velocity of detected objects. A radar beam is fired at a moving target — e.g. a motor car, as police use radar to detect speeding motorists — as it approaches or recedes from the radar source.
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Archaeology Vocab Ch. 3 A remote sensing technique in which radar pulses directed into the ground reflect back to the surface when they strike features or interfaces within the ground, showing the presence and depth of possible buried features.
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- Sonar definition, a method for detecting and locating objects submerged in water by echolocation. See more.
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What are the different uses of Radar? Image Credit: Main Image: Radar is an object-detection system which utilizes Electromagnetic waves, specifically radio waves to determine the range, altitude, direction, or speed of both moving and fixed objects such as aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations.
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Radar That's no problem, because radio waves (and light) travel fast enough to go seven times around the world in a second! If an enemy plane is 160 km (100 miles) away, a radar beam can travel that distance and back in less than a thousandth of a second. The antenna doubles up as a radar receiver as well as a transmitter. In fact, it alternates between the two jobs.
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radar (ˈreɪ dɑr) n. 1. a device or system for determining the presence and location of an object by measuring the direction and timing of radio waves. 2. a means of awareness; perception: lobbyists working under the media's radar.
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Measuring Precipitation The data can be transmitted over many miles or kilometres, and the measuring method is very accurate and with a maxium deviation of +/- 2%. A weather radar is a type of radar used to locate precipitation, calculate its motion, estimate its type (rain, snow, hail, etc.), and forecast its future position and intensity. Weather radars are mostly doppler radars, capable of detecting the motion of rain droplets in addition to intensity of the precipitation.
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Measuring Precipitation Measuring Precipitation with Weather Radar A weather radar is a type of radar used to locate precipitation, calculate its motion, estimate its type (rain, snow, hail, etc.), and forecast its future position and intensity.
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Radar chart A radar chart is a graphical method of displaying multivariate data in the form of a two-dimensional chart of three or more quantitative variables represented on axes starting from the same point. The relative position and angle of the axes is typically uninformative. The radar chart is also known as web chart, spider chart, star chart, star plot, cobweb chart, irregular polygon, polar chart, or kiviat diagram.
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- Radar, which stands for Radio Detection and Ranging, works by transmitting electromagnetic waves that bounce off of a moving object. After the wave is reflected by an object, it changes frequency, and the radar machine interprets the frequency in a calculation of speed.
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How Radar Detectors Work Radars are frequently used to identify distance and speed, such as how far away an object is or how fast it is moving. A radar device emits a radio wave, which moves at the speed of light, and bounces back to the radar device when it encounters an object in its path.
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Ground-penetrating radar Hyperbolic arrivals (arrows) indicate the presence of diffractors buried beneath the surface, possibly associated with human burials. Reflections from soil layering are also present (dashed lines). Ground-penetrating radar (GPR) is a geophysical method that uses radar pulses to image the subsurface. This nondestructive method uses electromagnetic radiation in the microwave band (UHF/VHF frequencies) of the radio spectrum, and detects the reflected signals from subsurface structures.
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- Recommendations. 1  When using Loctite, be sure that it will contact only metal parts; or, if it will contact plastic parts, be sure that they are resistant to the formulation of Loctite being used. 2  Always check with the manufacturer of a device before adding a new maintenance step.
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- The word radar is an acronym derived from the words RAdio Detection And Ranging. It refers to the technique of using radio waves to detect the presence of objects in the atmosphere. Radar was designed shortly before World War II. Its primary purpose was to detect the presence of aircraft. Today, radar is used for a wide array of applications, but primarily to detect precipitation and other meteorological events.
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Radar Basics Synthetic Aperture Radar. A Synthetic Aperture Radar (SAR), or SAR, is a coherent mostly airborne or spaceborne sidelooking radar system which utilizes the flight path of the platform to simulate an extremely large antenna or aperture electronically, and that generates high-resolution remote sensing imagery.
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Radar The term RADAR itself, not the actual development, 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 the common noun radar, losing all capitalization.
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Distance Measurements with Lasers Laser Radar. A laser radar is a device which uses one of the distance measurement techniques as described above, and scans the direction of the distance measurement in two dimensions. This allows the acquisition of an image, or more precisely a depth profile of some object, as required e.g. in robotics.ome of the most important techniques used for laser distance meters are as follows: 1  Triangulation is a geometric method, useful for distances in the range of ≈ 1 mm to many kilometers.
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How Radar Works RADAR stands for RAdio Detecting And Ranging and as indicated by the name, it is based on the use of radio waves. Radars send out electromagnetic waves similar to wireless computer networks and mobile phones.
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Radar Radar of the type used for detection of aircraft. It rotates steadily, sweeping the airspace with a narrow beam. Radar is an object-detection system that uses radio waves to determine the range, angle, or velocity of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain.
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Radar Radar works in much the same way. The word radar stands for ra dio d etection a nd r anging—and that gives a pretty big clue as to what it does and how it works. Imagine an airplane flying at night through thick fog.