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The Rebecca/Eureka transponding radar was a short-range radio navigation system used for the dropping of airborne forces and their supplies. It consisted of two parts, the Rebecca airborne transceiver and antenna system, and the Eureka ground-based transponder. Rebecca calculated the range to the Eureka based on the timing of the return signals, and its relative position using a highly directional antenna. The 'Rebecca' name comes from the phrase "Recognition of beacons". The 'Eureka' name comes from the Greek word meaning "I have found it!".

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  • Rebecca/Eureka transponding radar (en)
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  • The Rebecca/Eureka transponding radar was a short-range radio navigation system used for the dropping of airborne forces and their supplies. It consisted of two parts, the Rebecca airborne transceiver and antenna system, and the Eureka ground-based transponder. Rebecca calculated the range to the Eureka based on the timing of the return signals, and its relative position using a highly directional antenna. The 'Rebecca' name comes from the phrase "Recognition of beacons". The 'Eureka' name comes from the Greek word meaning "I have found it!". (en)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/AirborneLongWaveRebeccaResponsor.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/LightWeightLongWaveEurekaRacons.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Rebecca-antenna-B-24D-Playmate.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Rebecca_transponding_radar_reciver.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Royal_Air_Force_Radar,_1939-1945_CH15214.jpg
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