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Transit Research and Attitude Control : ウィキペディア英語版 | Transit Research and Attitude Control
The Transit Research and Attitude Control (TRAAC) satellite was launched by the U. S. Navy from Cape Canaveral along with Transit 4B on November 15, 1961. == Mission == The 109 kg satellite was used to test the feasibility of using gravity-gradient stabilization in Transit navigational satellites.〔(【引用サイトリンク】title=TRAAC )〕 It provided information on the effects of radiation from nuclear explosions in space, as it was one of several satellites whose detectors provided data for the Starfish Prime test; ultimately its solar cells were damaged by the radiation and it ceased operation. (It was among several satellites which were inadvertently damaged or destroyed by the Starfish Prime high-altitude nuclear test on July 9, 1962 and subsequent radiation belt.) It is expected to orbit for 800 years at an altitude of about .
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