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KH-4 CORONA

Early systems (KH-1, KH-2, KH-3 and KH-6) carried a single panoramic camera, or a single frame camera (KH-5), while the later systems (KH-4, KH-4A, and KH-4B) carried two panoramic cameras with 30 degrees separation angle. For KH-4, KH-4A,and KH-4B missions, the two cameras are referred to as fore (for forward looking) and aft (for rear looking). The KH-6 camera was programmed to tilt between fore and aft to cover the same land area twice during a photographic pass and thus to acquire stereo coverage. The satellites were designed to deorbit a film capsule (referred to as a "bucket")from space with mid-air recovery of the returning capsule by a specially equipped aircraft. Early systems operated with a single bucket, while later systems were configured with two buckets; the KH-4A was the first satellite with multiple film buckets.

KH Designator System Sucessful Mission Numbers Period of Operations Amount of Film (ft.) No. of Primary Camera Frames
KH-4 CORONA 9031,
9032,
9035,
9037,
9038,
9039,
9040,
9041,
9043,
9044,
9045,
9047,
9048,
9050,
9051,
9053,
9054,
9056,
9057,
9062
February 1962 - December 1963 239,299 101,743
KH-4A CORONA 1001,
1002,
1004,
1006-1031,
1033-1052
August 1963 - October 1969 1,293,025 517,688
KH-4B CORONA 1101-1112,
1114-1117
September 1967 - May 1972 *505,970 188,526



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