radar Hear it!

radar Definition

☆ ra·dar (rā′där′)

noun

any of several systems or devices using transmitted and reflected radio waves for detecting a reflecting object, as an aircraft, and determining its direction, distance, height, or speed, or in storm detection, mapping, navigation, etc.

Etymology: ra(dio) d(etecting) a(nd) r(anging)

radar Synonyms

radar

n.

radio detecting and ranging, radio locator (British), radiolocation, AWACS, Loran, teleran, Missile Site Radar (MSR), Multi-Function Array Radar (MAR); see also detector, electronics.

radar (radio detecting and ranging) Telecom Definition
A microwave radio technology that uses reflected energy to detect and determine the direction of and distance to remote objects. Multiple return signals can be correlated over time to determine the velocity and direction of moving objects. Applications include navigation, targeting, and tracking for civilian and military purposes. See also microwave, radio, and sonar.
radar Usage Examples

Converse of object

  • ground-penetrating: Using borehole ground-penetrating radar to measure the water content of warm ice in a polythermal glacier in Arctic Sweden ( Ref.
  • penetrate: We have surveys using ground penetrating radar of the Treblinka camp looking for mass graves.

Adjective modifier

  • airborne: RAF uses airborne radar successfully The RAF used airborne radar successfully for the first time.
  • ground-based: And starting in September of this year we began integrating ship-based and ground-based radars into our test against intercontinental ballistic missiles.
  • spaceborne: Most airborne and spaceborne radars employ this type of radar.
  • centimetric: Centimetric radar uses frequencies in the band 3,000 to 30,000 Mc/s.
  • polarimetric: This is referred to as polarization synthesis, and illustrates the power and flexibility of a fully polarimetric radar.
  • pulse-modulated: Terms Used in Pulsed Radar We have already met some of the terms used in pulse-modulated radar.

Modifies a noun

  • detector: Much more than just a radar detector, for only £ 450.
  • altimeter: There was no radar altimeter or any other equipment that could be electronically detected.
  • reflector: A sledgehammer was applied with no dent; hardly paper backed foil radar reflector easily torn by a 4 year old.
  • antenna: The Flag Officer's Pennant is just visible below the radar antenna.
  • altimetry: Radar altimetry is used on aircraft for altitude determination and on aircraft and satellites for topographic mapping and sea surface height estimation.
  • interferometry: Radar Interferometry has been used to produce ground motion maps.

Noun used with modifier

  • aperture: The modified Bombardier Global Express is fitted with an active synthetic aperture radar for ground surveillance.
  • ground-penetrating: On Mars they plan to do both: drilling to search for water, and using ground-penetrating radar to determine the depth of permafrost.
  • doppler: Todays weather plus a 36 hour forecast and doppler radar.
  • surveillance: If surveillance radar approach facility is also required, an additional charge of £ 77 + VAT per hour is payable.
  • scatter: Track Record EISCAT is the worlds leading incoherent scatter radar facility, in terms of capability.
  • rainfall: More about the rainfall animation This animation shows rainfall radar images at half-hourly intervals, for the last six hours.