High Quality Content by WIKIPEDIA articles! The Missile Defense Alarm System was an American system of 12 early-warning satellites that provided limited notice of Soviet intercontinental ballistic missile launches between 1960 and 1966. Originally intended to serve as a complete early-warning system working in conjunction with the Ballistic Missile Early Warning System, cost and reliability concerns limited the project to a research and development role. Three of the system's 12 launches ended in failure, and the remaining nine satellites provided crude infrared early-warning coverage of the Soviet Union until the project was replaced by the Defense Support Program, which served as a successor program. MiDAS represented one element of the United States's first generation of reconnaissance satellites that also included the Corona and Samos series. Though MiDAS failed in its primary role as a system of infrared early-warning satellites, it pioneered the technologies needed in successor systems.

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