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Monica (radar) : ウィキペディア英語版 | Monica (radar)
Monica was a range-only tail warning radar for bombers, introduced by the RAF in June 1942.〔"Bf 110 vs. Lancaster", Robert Forczyk, Osprey Publishing, 2013, p. 11〕 Officially known as ARI 5664, it operated at the boundary between VHF and UHF frequencies of around 300 MHz. It was developed at the Bomber Support Development Unit in Worcestershire. Unfortunately for the RAF, the Germans quickly developed a passive radar receiver, Flensburg (FuG 227), which was used by Luftwaffe nightfighters from spring 1944 onward to home in on bombers using Monica.〔Price p100〕 On the morning of 13 July 1944, a Junkers Ju 88G-1 nightfighter equipped with Flensburg mistakenly landed at RAF Woodbridge. After examining the Flensburg equipment, the RAF ordered Monica withdrawn from all Bomber Command aircraft.〔Price p154〕 Monica was also used by the U.S. Army Air Corps as the AN/APS-13, where - known as ''Archie'' - it was also used as the radar altimeter for the Little Boy atomic bomb dropped on Hiroshima. ==See also==
* List of World War II electronic warfare equipment
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