Radar Basics
The sending and retrieving of signals, detecting a target and different scanning modes.
Radar Imagery
WSR-88D and MDR radar imagery.
1. RADAR is an acronym for:
**Radio Detection and Ranging**
2. A Radar pulse travels at the speed of light. 186,000 miles per second.
Radar Mosaics
National, regional, and state radar images on weatherTAP are produced by compiling data from many NEXRAD sites. All of these products use the Precipitation mode scale, even if the individual sites are in Clear Air mode.
VIPIR radar is a scientific weather radar system which integrates each of the following: 3D radar, storm tracker, snow machine, and a highly accurate thermometer. It is manufactured by Baron Services, Inc., of Huntsville, Alabama.
Contents ...
radar - (Coined word for radio detection and ranging.) An electronic instrument used for the detection and ranging of distant objects of such composition that they scatter or reflect radio energy.
Radar Data Acquisition
An acronym for Radar Data Acquisition. The RDA is the hardware component of the NEXRAD system that consists of the radar antenna, transmitter, receiver, tower, and controlling computer.
radar (radio detection and ranging)
An electronic instrument that broadcasts a microwave electromagnetic radiation signal and receives the reflected portion of this signal from a target.
Radar Data Acquisition (RDA): The RDA is the origination point of the WSR-88D radar data that will be eventually used by the radar operator.
Radar Reflectivity The sum of all backscattering cross-sections (e.g., precipitation particles) in a pulse resolution volume divided by that volume.
Radar - permalink - collapse
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Acronym for RAdio Detection And Ranging; a radio device or system for locating an object by means of ultrahigh-frequency radio waves reflected from the object and received, observed, ...
RADAR 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.
RADAR - acronym for RAdio Detection And Ranging; a radio device or system for locating an object by means of ultrahigh-frequency radio waves reflected from the object and received, observed, ...
RADARSONDE OBSERVATION
An upper air observation used to determine winds and other meteorological data, by tracking the range, elevation, and azimuth of a radar target carried aloft. A type of rawinsonde.
radar altitude—The altitude of an aircraft determined by radar-type radio altimeter; thus the actual distance from the nearest terrain or water feature encompassed by the downward directed radar beam.
Radar
Radio Detection And Ranging. 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.
Radial velocity ...
Radar - a radio device that calculates the distance to objects, such as storms, within its range.
Radiosonde - the package of weather instruments attached to a weather balloon. Equipped with a radio transmitter.
Radar echo: The energy scattered back from a target and detected by the radar receiver. The amount of energy received by the radar is the reflectivity.
Radiant energy. See Radiation ...
RADAR: An instrument used to detect precipitation by measuring the strength of the electromagnetic signal reflected back. (RADAR= Radio Detection and Ranging)
RADIATION FOG: See ground fog.
Radar- a method of detecting the distance, size, and movement of objects by their reflection of radio waves.
Radiosonde- a balloon carrying instruments for measuring conditions in the upper atmosphere.
radar: an electronic instrument that broadcasts and receives microwave signals back from precipitation areas, and determines their location, height, movement, and intensity.
Radar
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.
Radar 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.
Radar echo Microwaves scattered or reflected by distant rain or snow back to a receiver where they are displayed as bright spots on a cathode ray tube.
Doppler radar: weather radar system that employs the apparent shift in frequency of radio waves to perceive air motion and consequently predict tornadoes and precipitation sooner than previous radars, ...
DOPPLER RADAR Weather radar that measures direction and speed of a moving object, such as drops of precipitation, by determining whether atmospheric motion is horizontally toward or away from the radar.
Doppler radar - Radar that measures speed and direction of a moving object, such as water or ice particles, birds, and insects.
Doppler Radar - A type of radar that has the capacity of detecting motion direction.
Drizzle - Precipitation from stratus clouds consisting of tiny droplets.
Doppler Radar The Doppler radar is a type of weather survelliance radar which takes advantage of the Doppler effect.
Doppler Radar The weather radar system that uses the Doppler shift of radio waves to detect air motion that can result in tornadoes and precipitation, as previously-developed weather radar systems do.
Radar, Weather: brochure (size 161K)
Rainfall Climatology Overview: Australian rainfall maps in colour and
black and white
Rainfall in El Niño Years: links to rainfall maps ...
Radar will observe essentially one long-lived cell, but small perturbations to the cell structure may be evident.
RADAR: A device used to detect precipitation by sending an electromagnetic signal and measuring the intensity of the reflected energy. (RAdio Detection And Ranging) ...
Radar- 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.
Radar that measures speed and direction of a moving object, such as water or ice particles, birds, and insects.
Downwelling(1) ...
Radar echoes caused by birds, insects, and localized refractive index discontinuities.
Angle of Reflection ...
Radar - An electronic instrument, which determines the direction and distance of objects that, reflect radio energy back to the radar site. This is what meteorologists use to see rain or snow.
RADAR - Radio Acquisition Designation And Ranging. A device using radio waves to display information on distant targets reflecting the waves back to the antenna.
A radar reflectivity signature seen as a V-shaped notch in the downwind part of a thunderstorm echo.
A radar echo which is linear but bent outward in a bow shape. Damaging straight-line winds often occur near the "crest" or centre of a bow echo.
PE - In radar, abbreviation for permanent echo.
period - Any function of time f(t) is periodic with period t if f(t) = f(t + t[&tgr;]) for all times t, where t[&tgr;] is the smallest number for which this equality holds.
BOW ECHO
A radar echo signature often associated with severe thunderstorms, especially those that produce wind damage. It is bent outward in a "bow" shape.
MST radar Abbreviation for mesosphere-stratosphere-troposphere radar. A type of wind profiler designed to measure winds and other atmospheric parameters up to altitudes of 100 km or more. MTBF Abbreviation for mean time between failures.
Hook Echo - A radar pattern sometimes observed in the southwest quadrant of a tornadic thunderstorm.
Reflectivity - Radar term referring to the ability of a radar target to return energy; used to estimate precipitation intensity and rainfall rates.
RRainRARainRADAP IIRAdar DAta Processor II, attached to some WSR-57 and WSR-74 radar units.
When working with radars, this often refers to the more or less random changes in direction of radio energy.
TransmitterThe radar equipment used for generating and amplifying a radio frequency (RF) carrier signal, modulating the carrier signal with intelligence, ...
At far ranges from the radar, a storm may occupy only a portion of the radar beam (which may be several miles across).
As an aside, although the UK radarnetwork can detect areas of precipitation very well, there are problems with detecting areas of rain versus snow, due to the narrow temperature/humidity band within which the phase-change occurs.
The value of Z is a function of the amount of radar beam energy that is backscattered by a target and detected as a signal (or echo). Higher values of Z (and dBZ) thus indicate more energy being backscattered by a target.
Acronym for Next Generation Weather Radar program, a joint program of the U.S. Departments of Commerce, Defense, and Transportation during the 1980s and 1990s to develop and deploy a network of operational Doppler weather radars. 2.
BRIGHT BAND- A maximum in the radar reflectivity caused by snow melting as it falls. Melting snow can have a reflectivity similar to small hail.
Chaff typically produces a radar echo which closely resembles precipitation. Chaff drops once were conducted by the military in order to confuse enemy radar, but now are conducted mainly for radar testing and calibration purposes.
Echo - The energy received on radar that results from back-scattered energy; indicates the presence of precipitation (targets).
EL - Equilibrium Level. The level where unstable air becomes stable again.
ANOMALOUS PROPAGATION This refers to the non-standard propagation of a beam of energy, radio or radar, under certain atmospheric conditions, appearing as false (non-precipitation) echoes. May be referred to as A.P.
Rawinsonde Radiosonde which is tracked by radar or radio-theodolite to measure the wind aloft.
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Tornado Warning- Issued when a tornado is imminent or occurring. This includes when a tornado is indicated by Doppler radar or sighted by spotters. Action: Seek safe shelter immediately.
Radiosonde: an instrument that is carried aloft by a balloon to send back information on atmospheric temperature, pressure and humidity by means of a small, expendable radio transmitter. Radiosondes can be tracked by radar, radio direction finding, ...
Center/Vortex Fix
The location of the center of a tropical or subtropical cyclone obtained by reconnaissance aircraft penetration, satellite, radar, or synoptic data.
 See also: Weather, Air, Temperature, Surface, Cloud
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