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The AN/APS-4, originally known as ASH (air-surface, model H) is an early military air to air and air to surface radar used by American and British warplanes during World War II. APS-4 operated in the X band at 3 cm, compared to the 10 cm S band used by most radars of the era. This allowed the antenna to be greatly reduced in size and the unit as a whole to fit into a single streamlined fairing that could be mounted to many aircraft.

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rdfs:label
  • AN/APS-4 search radar (en)
rdfs:comment
  • The AN/APS-4, originally known as ASH (air-surface, model H) is an early military air to air and air to surface radar used by American and British warplanes during World War II. APS-4 operated in the X band at 3 cm, compared to the 10 cm S band used by most radars of the era. This allowed the antenna to be greatly reduced in size and the unit as a whole to fit into a single streamlined fairing that could be mounted to many aircraft. (en)
name
  • AN/APS-4 search radar (en)
foaf:depiction
  • http://commons.wikimedia.org/wiki/Special:FilePath/APS-4.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/An-APS-4_side_view.jpg
dcterms:subject
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sameAs
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thumbnail
caption
  • Front-oblique view of the AN/APS-4 radar pod without its external shell (en)
country
  • UK (en)
frequency
other names
  • ASH (en)
power
related
  • AN/APS-5, AN/APS-6 (en)
type
has abstract
  • The AN/APS-4, originally known as ASH (air-surface, model H) is an early military air to air and air to surface radar used by American and British warplanes during World War II. APS-4 operated in the X band at 3 cm, compared to the 10 cm S band used by most radars of the era. This allowed the antenna to be greatly reduced in size and the unit as a whole to fit into a single streamlined fairing that could be mounted to many aircraft. In American service it was used on many aircraft, including the Douglas C-47 Skytrain, North American P-82D/F/H Twin Mustang, Vought F4U-2\5N Corsair, Grumman F6F-3/5 Hellcat, Curtiss SB2C-5 Helldiver and Grumman TBF-3 and TBM-3S Avenger. In RAF service it was known as ASV Mark IX and equipped a number of aircraft including the Fairey Firefly, Fairey Barracuda, de Havilland Mosquito and a small number of Grumman Avengers. (en)
azimuth
beamwidth
  • ~10º horizontal, (en)
  • ~15º vertical (en)
precision
  • ~5º (en)
PRF
pulsewidth
RPM
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