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Corona (satellite)
The Corona program was a series of American strategic reconnaissance satellites produced and operated by the Central Intelligence Agency Directorate of Science & Technology with substantial assistance from the U.S. Air Force. The Corona satellites were used for photographic surveillance of the Soviet Union (USSR), the People's Republic of China, and other areas beginning in June 1959 and ending in May 1972. The name of this program is sometimes seen as "CORONA", but its actual name "Corona" was a codeword, not an acronym.
==History and costs==
Corona started under the name "Discoverer" as part of the WS-117L satellite reconnaissance and protection program of the US Air Force in 1956. The WS-117L was based on recommendations and designs from the RAND Corporation. The United States Air Force credits the Onizuka Air Force Station as being the "birthplace of the Corona program."〔(【引用サイトリンク】title='Mission accomplished' for NRO at Onizuka AFS )〕 In May 1958, the Department of Defense directed the transfer of the WS-117L program to Advanced Research Projects Agency. In FY1958, WS-117L was funded by the AF at a level of US$108.2 million (inflation adjusted US$ billion in ). For Discoverer, the Air Force and ARPA spent a combined sum of US$132.3 million in FY1959 (inflation adjusted US$ billion in ) and US$101.2 million in FY1960 (inflation adjusted US$ billion in ).〔(【引用サイトリンク】 url=http://www.nro.gov/foia/declass/WS117L_Records/52.PDF )〕 According to John N. McMahon, the total cost of the CORONA program amounted to $US 850 million.〔(【引用サイトリンク】title=CIA Holds Landmark Symposium on CORONA )〕
The Corona project was pushed forward rapidly following the shooting down of a U-2 spy plane over the Soviet Union in May 1960.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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