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Radar    音标拼音: [r'ed,ɑr]
n. 雷达,电波探测器

雷达,电波探测器

radar
雷达

radar
n 1: measuring instrument in which the echo of a pulse of
microwave radiation is used to detect and locate distant
objects [synonym: {radar}, {microwave radar}, {radio detection
and ranging}, {radiolocation}]

radar \ra"dar\ (r[=a]"d[aum]r), n. [acronym from RAdio Detection
And Ranging.]
1. An electronic device designed to detect objects at a
distance, and determine their distance from the device, by
transmitting a pulse of radio waves and measuring the time
required for the echo of the pulse to return to the
emitting device; as, the radar showed a plane approaching
rapidly. For more information of radar, see the article
What is Radar?. [acronym]
[PJC]

2. The method of detecting objects, finding their distance,
or determining their speed, by use of a radar[1] device;
as, modern radar can detect objects as small as raindrops.
[PJC]

92 Moby Thesaurus words for "radar":
AA radar, AFC, AFC mixer, CRT, CW oscillator, MAD radar, Navaglobe,
Oboe, TR switch, TR unit, VAR, Volscan, altimeter, amplifier,
analyzer, astronavigation, automatic electronic navigation,
automation, avionics, cascade screen, cathode-ray tube,
celestial navigation, chronometer, coastwise navigation, consolan,
dead reckoning, demodulator, detector, discriminator,
early-warning radar, electron microscopy, electron optics,
electron physics, electronic engineering, electronic navigation,
electronics, electrophysics, fix, frequency meter,
gun-directing radar, hard-tube pulser, indicator,
interception radar, limiter, line of position, local oscillator,
long-range radar, loran, magnetron, microwave mixer, mixer,
modulator, navar, navigation, network pulser,
omnidirectional range, omnirange, oscillator, overlapping,
panoramic radar, photoelectricity, pilotage, plane sailing,
point-to-point navigation, potentiometer, pulse generator,
radar telescope, radio, radio beacon, radio navigation, radionics,
range-sweep amplifier, range-sweep generator, receiver, screen,
second detector, sextant, shoran, sofar, sonar,
square-wave generator, synchronizer, tables, tacan, teleran,
television, timing unit, tracker, transistor physics, transmitter,
trigatron, visual-aural range

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  • NWS Radar
    Discover career opportunities at the National Weather Service The NWS Radar site displays the radar on a map along with forecast and alerts The radar products are also available as OGC compliant services to use in your application Review the Radar FAQ for help with the transition to the new site Contact the helpdesk for operational issues
  • Current US Doppler Radar Map -- Weather. com
    Follow along with us on the latest weather we're watching, the threats it may bring and check out the extended forecast each day to be prepared You can find the forecast for the days ahead in the
  • Weather and Radar Map for Nanshan District, Guangdong 518060, Peoples . . .
    Cloud images taken from various sources including infrared (thermal) satellite and visible satellite A combination of clouds and precipitation, including rain, snow and mixed (rain ice) Shows the
  • United States Weather Radar | AccuWeather
    See the latest United States Doppler radar weather map including areas of rain, snow and ice Our interactive map allows you to see the local national weather
  • Nanshan District, Guangdong, China Weather Radar | AccuWeather
    Track storms, and stay in-the-know and prepared for what's coming Easy to use weather radar at your fingertips!
  • 雷达 - 维基百科，自由的百科全书
    雷达 （radar）是 英文 “ Radio Detection and Ranging ”（直译：“ 无线电 探测与测距”）的 缩写 的 音译，即用无线电波的 反射 信号发现目标并测定其空间位置、移动方向、速度、相對距離以及大概形状的 电子设备。 雷达被广泛应用于 航空 与 航海 导航 、 军事 侦察 和 预警 、 气象 观测 以及 太空探索 等领域。 雷達的出現，始於 二戰 前。 虽然美、法等国亦注意到“以无线电探测目标的可能”，这在当时的学术界并不是秘密，但真正开始研制实用设备的是英、德2国。
  • WunderMap® | Interactive Weather Map and Radar | Weather Underground
    Weather Underground’s WunderMap provides interactive weather and radar Maps for weather conditions for locations worldwide
  • Weather Radar | Weather Underground
    The Current Radar map shows areas of current precipitation (rain, mixed, or snow) The map can be animated to show the previous one hour of radar
  • 雷达（利用电磁波探测目标的电子设备）_百度百科
    雷达就像探照灯一样，雷达发射一束电磁波，碰到物体以后反射回来，被接收机接收到，于是就能探测到物体。 [3] 雷达也被称为“ 无线电定位 ”。 雷达是利用电磁波探测目标的电子设备。 雷达发射电磁波对目标进行照射并接收其回波，由此获得目标至电磁波发射点的距离、距离变化率（径向速度）、方位、高度等信息。 雷达的出现，是由于一战期间当时英国和德国交战时，英国急需一种能探测空中金属物体的雷达（技术）能在反空袭战中帮助搜寻德国飞机。 二战期间，雷达就已经出现了地对空、空对地（搜索）轰炸、空对空（截击）火控、敌我识别功能的雷达技术。
  • Windy: Wind map weather forecast
    Worldwide animated weather map, with easy to use layers and precise spot forecast METAR, TAF and NOTAMs for any airport in the World SYNOP codes from weather stations and buoys Forecast models ECMWF, GFS, NAM and NEMS





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